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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: qcom: q6apm-lpass-dais: Fix NULL pointer dereference if source graph failed\n\nIf earlier opening of source graph fails (e.g. ADSP rejects due to\nincorrect audioreach topology), the graph is closed and\n\"dai_data-\u003egraph[dai-\u003eid]\" is assigned NULL.  Preparing the DAI for sink\ngraph continues though and next call to q6apm_lpass_dai_prepare()\nreceives dai_data-\u003egraph[dai-\u003eid]=NULL leading to NULL pointer\nexception:\n\n  qcom-apm gprsvc:service:2:1: Error (1) Processing 0x01001002 cmd\n  qcom-apm gprsvc:service:2:1: DSP returned error[1001002] 1\n  q6apm-lpass-dais 30000000.remoteproc:glink-edge:gpr:service@1:bedais: fail to start APM port 78\n  q6apm-lpass-dais 30000000.remoteproc:glink-edge:gpr:service@1:bedais: ASoC: error at snd_soc_pcm_dai_prepare on TX_CODEC_DMA_TX_3: -22\n  Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a8\n  ...\n  Call trace:\n   q6apm_graph_media_format_pcm+0x48/0x120 (P)\n   q6apm_lpass_dai_prepare+0x110/0x1b4\n   snd_soc_pcm_dai_prepare+0x74/0x108\n   __soc_pcm_prepare+0x44/0x160\n   dpcm_be_dai_prepare+0x124/0x1c0"
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        {
          "url": "https://git.kernel.org/stable/c/411f7d4f7038200cdf6d4f71ee31026ebf2dfedb"
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        {
          "url": "https://git.kernel.org/stable/c/68f27f7c7708183e7873c585ded2f1b057ac5b97"
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      "title": "ASoC: qcom: q6apm-lpass-dais: Fix NULL pointer dereference if source graph failed",
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    "datePublished": "2025-10-04T07:31:01.736Z",
    "dateReserved": "2025-04-16T07:20:57.148Z",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove\n\nThe original code uses cancel_delayed_work() in flexcop_pci_remove(), which\ndoes not guarantee that the delayed work item irq_check_work has fully\ncompleted if it was already running. This leads to use-after-free scenarios\nwhere flexcop_pci_remove() may free the flexcop_device while irq_check_work\nis still active and attempts to dereference the device.\n\nA typical race condition is illustrated below:\n\nCPU 0 (remove)                         | CPU 1 (delayed work callback)\nflexcop_pci_remove()                   | flexcop_pci_irq_check_work()\n  cancel_delayed_work()                |\n  flexcop_device_kfree(fc_pci-\u003efc_dev) |\n                                       |   fc = fc_pci-\u003efc_dev; // UAF\n\nThis is confirmed by a KASAN report:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in __run_timer_base.part.0+0x7d7/0x8c0\nWrite of size 8 at addr ffff8880093aa8c8 by task bash/135\n...\nCall Trace:\n \u003cIRQ\u003e\n dump_stack_lvl+0x55/0x70\n print_report+0xcf/0x610\n ? __run_timer_base.part.0+0x7d7/0x8c0\n kasan_report+0xb8/0xf0\n ? __run_timer_base.part.0+0x7d7/0x8c0\n __run_timer_base.part.0+0x7d7/0x8c0\n ? __pfx___run_timer_base.part.0+0x10/0x10\n ? __pfx_read_tsc+0x10/0x10\n ? ktime_get+0x60/0x140\n ? lapic_next_event+0x11/0x20\n ? clockevents_program_event+0x1d4/0x2a0\n run_timer_softirq+0xd1/0x190\n handle_softirqs+0x16a/0x550\n irq_exit_rcu+0xaf/0xe0\n sysvec_apic_timer_interrupt+0x70/0x80\n \u003c/IRQ\u003e\n...\n\nAllocated by task 1:\n kasan_save_stack+0x24/0x50\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0x7f/0x90\n __kmalloc_noprof+0x1be/0x460\n flexcop_device_kmalloc+0x54/0xe0\n flexcop_pci_probe+0x1f/0x9d0\n local_pci_probe+0xdc/0x190\n pci_device_probe+0x2fe/0x470\n really_probe+0x1ca/0x5c0\n __driver_probe_device+0x248/0x310\n driver_probe_device+0x44/0x120\n __driver_attach+0xd2/0x310\n bus_for_each_dev+0xed/0x170\n bus_add_driver+0x208/0x500\n driver_register+0x132/0x460\n do_one_initcall+0x89/0x300\n kernel_init_freeable+0x40d/0x720\n kernel_init+0x1a/0x150\n ret_from_fork+0x10c/0x1a0\n ret_from_fork_asm+0x1a/0x30\n\nFreed by task 135:\n kasan_save_stack+0x24/0x50\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3a/0x60\n __kasan_slab_free+0x3f/0x50\n kfree+0x137/0x370\n flexcop_device_kfree+0x32/0x50\n pci_device_remove+0xa6/0x1d0\n device_release_driver_internal+0xf8/0x210\n pci_stop_bus_device+0x105/0x150\n pci_stop_and_remove_bus_device_locked+0x15/0x30\n remove_store+0xcc/0xe0\n kernfs_fop_write_iter+0x2c3/0x440\n vfs_write+0x871/0xd70\n ksys_write+0xee/0x1c0\n do_syscall_64+0xac/0x280\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n...\n\nReplace cancel_delayed_work() with cancel_delayed_work_sync() to ensure\nthat the delayed work item is properly canceled and any executing delayed\nwork has finished before the device memory is deallocated.\n\nThis bug was initially identified through static analysis. To reproduce\nand test it, I simulated the B2C2 FlexCop PCI device in QEMU and introduced\nartificial delays within the flexcop_pci_irq_check_work() function to\nincrease the likelihood of triggering the bug."
        }
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      "title": "media: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39996",
    "datePublished": "2025-10-15T07:58:21.049Z",
    "dateReserved": "2025-04-16T07:20:57.151Z",
    "dateUpdated": "2026-05-11T21:40:27.487Z",
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              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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              "version": "3.1"
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          },
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              "content": {
                "id": "CVE-2022-49179",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
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        "providerMetadata": {
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: don\u0027t move oom_bfqq\n\nOur test report a UAF:\n\n[ 2073.019181] ==================================================================\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\n[ 2073.019192]\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[ 2073.019200] Call trace:\n[ 2073.019203]  dump_backtrace+0x0/0x310\n[ 2073.019206]  show_stack+0x28/0x38\n[ 2073.019210]  dump_stack+0xec/0x15c\n[ 2073.019216]  print_address_description+0x68/0x2d0\n[ 2073.019220]  kasan_report+0x238/0x2f0\n[ 2073.019224]  __asan_store8+0x88/0xb0\n[ 2073.019229]  __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019233]  bfq_put_async_queues+0xbc/0x208\n[ 2073.019236]  bfq_pd_offline+0x178/0x238\n[ 2073.019240]  blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019244]  bfq_exit_queue+0x128/0x178\n[ 2073.019249]  blk_mq_exit_sched+0x12c/0x160\n[ 2073.019252]  elevator_exit+0xc8/0xd0\n[ 2073.019256]  blk_exit_queue+0x50/0x88\n[ 2073.019259]  blk_cleanup_queue+0x228/0x3d8\n[ 2073.019267]  null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019274]  null_exit+0x90/0x114 [null_blk]\n[ 2073.019278]  __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019282]  el0_svc_common+0xc8/0x320\n[ 2073.019287]  el0_svc_handler+0xf8/0x160\n[ 2073.019290]  el0_svc+0x10/0x218\n[ 2073.019291]\n[ 2073.019294] Allocated by task 14163:\n[ 2073.019301]  kasan_kmalloc+0xe0/0x190\n[ 2073.019305]  kmem_cache_alloc_node_trace+0x1cc/0x418\n[ 2073.019308]  bfq_pd_alloc+0x54/0x118\n[ 2073.019313]  blkcg_activate_policy+0x250/0x460\n[ 2073.019317]  bfq_create_group_hierarchy+0x38/0x110\n[ 2073.019321]  bfq_init_queue+0x6d0/0x948\n[ 2073.019325]  blk_mq_init_sched+0x1d8/0x390\n[ 2073.019330]  elevator_switch_mq+0x88/0x170\n[ 2073.019334]  elevator_switch+0x140/0x270\n[ 2073.019338]  elv_iosched_store+0x1a4/0x2a0\n[ 2073.019342]  queue_attr_store+0x90/0xe0\n[ 2073.019348]  sysfs_kf_write+0xa8/0xe8\n[ 2073.019351]  kernfs_fop_write+0x1f8/0x378\n[ 2073.019359]  __vfs_write+0xe0/0x360\n[ 2073.019363]  vfs_write+0xf0/0x270\n[ 2073.019367]  ksys_write+0xdc/0x1b8\n[ 2073.019371]  __arm64_sys_write+0x50/0x60\n[ 2073.019375]  el0_svc_common+0xc8/0x320\n[ 2073.019380]  el0_svc_handler+0xf8/0x160\n[ 2073.019383]  el0_svc+0x10/0x218\n[ 2073.019385]\n[ 2073.019387] Freed by task 72584:\n[ 2073.019391]  __kasan_slab_free+0x120/0x228\n[ 2073.019394]  kasan_slab_free+0x10/0x18\n[ 2073.019397]  kfree+0x94/0x368\n[ 2073.019400]  bfqg_put+0x64/0xb0\n[ 2073.019404]  bfqg_and_blkg_put+0x90/0xb0\n[ 2073.019408]  bfq_put_queue+0x220/0x228\n[ 2073.019413]  __bfq_put_async_bfqq+0x98/0x168\n[ 2073.019416]  bfq_put_async_queues+0xbc/0x208\n[ 2073.019420]  bfq_pd_offline+0x178/0x238\n[ 2073.019424]  blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019429]  bfq_exit_queue+0x128/0x178\n[ 2073.019433]  blk_mq_exit_sched+0x12c/0x160\n[ 2073.019437]  elevator_exit+0xc8/0xd0\n[ 2073.019440]  blk_exit_queue+0x50/0x88\n[ 2073.019443]  blk_cleanup_queue+0x228/0x3d8\n[ 2073.019451]  null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019459]  null_exit+0x90/0x114 [null_blk]\n[ 2073.019462]  __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019467]  el0_svc_common+0xc8/0x320\n[ 2073.019471]  el0_svc_handler+0xf8/0x160\n[ 2073.019474]  el0_svc+0x10/0x218\n[ 2073.019475]\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\n which belongs to the cache kmalloc-1024 of size 1024\n[ 2073.019484] The buggy address is located 552 bytes inside of\n 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\n[ 2073.019486] The buggy address belongs to the page:\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\n[ 2073.020409] ra\n---truncated---"
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable BFQ cgroup path is reached through local block I/O (read/write syscalls) and blkcg association changes on a BFQ-managed queue, not via network packet processing.\nAC:L - An attacker can induce the oom_bfqq fallback via memory pressure they control, then trigger bfq_bfqq_move through cgroup-associated I/O; BFQ with group scheduling is a common real-world configuration, not a rare dependency.\nPR:L - An unprivileged local user can submit I/O on BFQ devices and cause bios/tasks to span blkcgs (app cgroups, writeback, delegated/user scopes); CAP_SYS_ADMIN is not required to reach the buggy move path.\nUI:N - The attacker performs the I/O and cgroup-related actions themselves; no separate victim interaction is required.\nS:U - This is a kernel memory-corruption bug within the host kernel\u0027s authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug is a use-after-free with a confirmed write to a freed bfq_group; UAF control of freed object contents enables arbitrary kernel memory disclosure.\nI:H - The KASAN report shows an 8-byte write to freed memory in __bfq_put_async_bfqq during group teardown, which is exploitable for heap corruption and control-flow hijacking.\nA:H - The use-after-free causes kernel oops/panic during elevator/device teardown and can crash the system even without a full exploit."
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          "url": "https://git.kernel.org/stable/c/8410f70977734f21b8ed45c37e925d311dfda2e7"
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      "title": "block, bfq: don\u0027t move oom_bfqq",
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  "cveMetadata": {
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    "dateUpdated": "2026-08-12T23:58:15.467Z",
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        "title": "CVE Program Container"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfsplus: fix slab-out-of-bounds read in hfsplus_uni2asc()\n\nThe hfsplus_readdir() method is capable to crash by calling\nhfsplus_uni2asc():\n\n[  667.121659][ T9805] ==================================================================\n[  667.122651][ T9805] BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x902/0xa10\n[  667.123627][ T9805] Read of size 2 at addr ffff88802592f40c by task repro/9805\n[  667.124578][ T9805]\n[  667.124876][ T9805] CPU: 3 UID: 0 PID: 9805 Comm: repro Not tainted 6.16.0-rc3 #1 PREEMPT(full)\n[  667.124886][ T9805] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[  667.124890][ T9805] Call Trace:\n[  667.124893][ T9805]  \u003cTASK\u003e\n[  667.124896][ T9805]  dump_stack_lvl+0x10e/0x1f0\n[  667.124911][ T9805]  print_report+0xd0/0x660\n[  667.124920][ T9805]  ? __virt_addr_valid+0x81/0x610\n[  667.124928][ T9805]  ? __phys_addr+0xe8/0x180\n[  667.124934][ T9805]  ? hfsplus_uni2asc+0x902/0xa10\n[  667.124942][ T9805]  kasan_report+0xc6/0x100\n[  667.124950][ T9805]  ? hfsplus_uni2asc+0x902/0xa10\n[  667.124959][ T9805]  hfsplus_uni2asc+0x902/0xa10\n[  667.124966][ T9805]  ? hfsplus_bnode_read+0x14b/0x360\n[  667.124974][ T9805]  hfsplus_readdir+0x845/0xfc0\n[  667.124984][ T9805]  ? __pfx_hfsplus_readdir+0x10/0x10\n[  667.124994][ T9805]  ? stack_trace_save+0x8e/0xc0\n[  667.125008][ T9805]  ? iterate_dir+0x18b/0xb20\n[  667.125015][ T9805]  ? trace_lock_acquire+0x85/0xd0\n[  667.125022][ T9805]  ? lock_acquire+0x30/0x80\n[  667.125029][ T9805]  ? iterate_dir+0x18b/0xb20\n[  667.125037][ T9805]  ? down_read_killable+0x1ed/0x4c0\n[  667.125044][ T9805]  ? putname+0x154/0x1a0\n[  667.125051][ T9805]  ? __pfx_down_read_killable+0x10/0x10\n[  667.125058][ T9805]  ? apparmor_file_permission+0x239/0x3e0\n[  667.125069][ T9805]  iterate_dir+0x296/0xb20\n[  667.125076][ T9805]  __x64_sys_getdents64+0x13c/0x2c0\n[  667.125084][ T9805]  ? __pfx___x64_sys_getdents64+0x10/0x10\n[  667.125091][ T9805]  ? __x64_sys_openat+0x141/0x200\n[  667.125126][ T9805]  ? __pfx_filldir64+0x10/0x10\n[  667.125134][ T9805]  ? do_user_addr_fault+0x7fe/0x12f0\n[  667.125143][ T9805]  do_syscall_64+0xc9/0x480\n[  667.125151][ T9805]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[  667.125158][ T9805] RIP: 0033:0x7fa8753b2fc9\n[  667.125164][ T9805] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 48\n[  667.125172][ T9805] RSP: 002b:00007ffe96f8e0f8 EFLAGS: 00000217 ORIG_RAX: 00000000000000d9\n[  667.125181][ T9805] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa8753b2fc9\n[  667.125185][ T9805] RDX: 0000000000000400 RSI: 00002000000063c0 RDI: 0000000000000004\n[  667.125190][ T9805] RBP: 00007ffe96f8e110 R08: 00007ffe96f8e110 R09: 00007ffe96f8e110\n[  667.125195][ T9805] R10: 0000000000000000 R11: 0000000000000217 R12: 0000556b1e3b4260\n[  667.125199][ T9805] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[  667.125207][ T9805]  \u003c/TASK\u003e\n[  667.125210][ T9805]\n[  667.145632][ T9805] Allocated by task 9805:\n[  667.145991][ T9805]  kasan_save_stack+0x20/0x40\n[  667.146352][ T9805]  kasan_save_track+0x14/0x30\n[  667.146717][ T9805]  __kasan_kmalloc+0xaa/0xb0\n[  667.147065][ T9805]  __kmalloc_noprof+0x205/0x550\n[  667.147448][ T9805]  hfsplus_find_init+0x95/0x1f0\n[  667.147813][ T9805]  hfsplus_readdir+0x220/0xfc0\n[  667.148174][ T9805]  iterate_dir+0x296/0xb20\n[  667.148549][ T9805]  __x64_sys_getdents64+0x13c/0x2c0\n[  667.148937][ T9805]  do_syscall_64+0xc9/0x480\n[  667.149291][ T9805]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[  667.149809][ T9805]\n[  667.150030][ T9805] The buggy address belongs to the object at ffff88802592f000\n[  667.150030][ T9805]  which belongs to the cache kmalloc-2k of size 2048\n[  667.151282][ T9805] The buggy address is located 0 bytes to the right of\n[  667.151282][ T9805]  allocated 1036-byte region [ffff88802592f000, ffff88802592f40c)\n[  667.1\n---truncated---"
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              "value": "AV:L - The bug is reached only by mounting an attacker-authored HFS+ volume (loop-backed image or removable media) and then issuing ordinary local syscalls \u2014 `getdents64(2)` via `hfsplus_readdir()` or `listxattr(2)` via `hfsplus_listxattr()`. There is no network-facing consumer of fs/hfsplus/unicode.c.\nAC:L - The overread length is the raw 16-bit `hfsplus_unistr.length` field the attacker writes into the Catalog/Attributes b-tree node, so a single purpose-built image triggers it deterministically on the first `readdir`, with no race, timing window, or memory-layout precondition outside the attacker\u0027s control. Adjacent kmalloc-2k contents can be groomed by repeated allocations before the directory read.\nPR:L - hfsplus is FS_REQUIRES_DEV without FS_USERNS_MOUNT, so a bare mount(2) needs CAP_SYS_ADMIN, but in the most severe reasonable deployment an unprivileged local user routinely gets a crafted HFS+ image mounted through udisks2 loop-setup, desktop/kiosk removable-media automounters, or `user`/autofs fstab delegation. Once mounted, the getdents64 or listxattr that fires the overread requires no privilege at all.\nUI:N - The attacker performs every step personally \u2014 presents the crafted volume, which an automounter consumes with no human action, and then runs the directory read itself. No second victim user has to be induced into any action.\nS:U - The out-of-bounds access occurs in HFS+ unicode conversion inside the kernel and its effects remain within that same kernel security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The loop stops only when the 1530-byte output buffer fills, so it reads up to ~3 KB past the 1036-byte `hfs_find_init()` key allocation \u2014 through the object tail and into neighbouring kmalloc-2k objects \u2014 and every harvested byte is handed to `dir_emit()`/`copy_name()` and returned to userspace as a filename or xattr name. That is a repeatable, attacker-length-controlled kernel heap disclosure primitive suitable for defeating KASLR and lifting secrets from groomed adjacent slab objects.\nI:N - The defect is strictly a read overrun; every store through `op` remains bounded by the remaining output length enforced by `nls-\u003euni2char`, and the `-EINVAL` fallback stays inside the `+1` slack of `strbuf`. No kernel memory is modified.\nA:H - The multi-kilobyte overread can walk off the end of the slab page into unmapped memory, faulting in the middle of `iterate_dir()` while the btree mutex and inode lock are held, which oopses and wedges the filesystem; under KASAN, SLUB_DEBUG, or debug_pagealloc \u2014 common in hardened, appliance, and embedded builds \u2014 it faults immediately, and with panic_on_oops it is a full system panic the attacker can repeat at will."
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    "state": "PUBLISHED"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nskbuff: skb_segment, Call zero copy functions before using skbuff frags\n\nCommit bf5c25d60861 (\"skbuff: in skb_segment, call zerocopy functions\nonce per nskb\") added the call to zero copy functions in skb_segment().\nThe change introduced a bug in skb_segment() because skb_orphan_frags()\nmay possibly change the number of fragments or allocate new fragments\naltogether leaving nrfrags and frag to point to the old values. This can\ncause a panic with stacktrace like the one below.\n\n[  193.894380] BUG: kernel NULL pointer dereference, address: 00000000000000bc\n[  193.895273] CPU: 13 PID: 18164 Comm: vh-net-17428 Kdump: loaded Tainted: G           O      5.15.123+ #26\n[  193.903919] RIP: 0010:skb_segment+0xb0e/0x12f0\n[  194.021892] Call Trace:\n[  194.027422]  \u003cTASK\u003e\n[  194.072861]  tcp_gso_segment+0x107/0x540\n[  194.082031]  inet_gso_segment+0x15c/0x3d0\n[  194.090783]  skb_mac_gso_segment+0x9f/0x110\n[  194.095016]  __skb_gso_segment+0xc1/0x190\n[  194.103131]  netem_enqueue+0x290/0xb10 [sch_netem]\n[  194.107071]  dev_qdisc_enqueue+0x16/0x70\n[  194.110884]  __dev_queue_xmit+0x63b/0xb30\n[  194.121670]  bond_start_xmit+0x159/0x380 [bonding]\n[  194.128506]  dev_hard_start_xmit+0xc3/0x1e0\n[  194.131787]  __dev_queue_xmit+0x8a0/0xb30\n[  194.138225]  macvlan_start_xmit+0x4f/0x100 [macvlan]\n[  194.141477]  dev_hard_start_xmit+0xc3/0x1e0\n[  194.144622]  sch_direct_xmit+0xe3/0x280\n[  194.147748]  __dev_queue_xmit+0x54a/0xb30\n[  194.154131]  tap_get_user+0x2a8/0x9c0 [tap]\n[  194.157358]  tap_sendmsg+0x52/0x8e0 [tap]\n[  194.167049]  handle_tx_zerocopy+0x14e/0x4c0 [vhost_net]\n[  194.173631]  handle_tx+0xcd/0xe0 [vhost_net]\n[  194.176959]  vhost_worker+0x76/0xb0 [vhost]\n[  194.183667]  kthread+0x118/0x140\n[  194.190358]  ret_from_fork+0x1f/0x30\n[  194.193670]  \u003c/TASK\u003e\n\nIn this case calling skb_orphan_frags() updated nr_frags leaving nrfrags\nlocal variable in skb_segment() stale. This resulted in the code hitting\ni \u003e= nrfrags prematurely and trying to move to next frag_skb using\nlist_skb pointer, which was NULL, and caused kernel panic. Move the call\nto zero copy functions before using frags and nr_frags."
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              "value": "AV:L - The bug is only reachable on TX skbs with zerocopy user frags (MSG_ZEROCOPY or vhost_net handle_tx_zerocopy); received remote packets do not carry skb_zcopy state, so skb_orphan_frags() is a no-op and cannot trigger the stale-frag path.\nAC:L - An attacker controls SO_ZEROCOPY/MSG_ZEROCOPY iov layout (hence how skb_copy_ubufs() changes nr_frags) and can force software GSO via netem/tbf in an unprivileged user+net namespace or any non-TSO egress path, making the trigger reliable.\nPR:L - SO_ZEROCOPY has no capability check, and CAP_NET_ADMIN needed to attach netem or disable TSO is available via unprivileged user namespaces; no real init-namespace root is required.\nUI:N - The attacker triggers the bug entirely through their own socket sends and optional qdisc configuration; no victim interaction is required.\nS:U - Corruption and crash occur in host kernel skbuff/GSO state within the same kernel security authority; this is standard local kernel memory corruption, not a VM/IOMMU/sandbox boundary escape.\nC:H - When skb_copy_ubufs() reduces nr_frags, skb_segment continues with a stale larger nfrags and re-refs frag slots whose pages were already unreferenced, yielding a UAF that can disclose kernel memory.\nI:H - The same stale-frag UAF (and dangling frag pointer if skb_unclone relocates shinfo) is heap memory corruption exploitable for arbitrary write/control-flow hijacking per UAF scoring guidance.\nA:H - The reported impact is a kernel NULL pointer dereference panic in skb_segment, and the UAF paths also cause oops/panic-level denial of service."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Unregister devlink params in case interface is down\n\nCurrently, in case an interface is down, mlx5 driver doesn\u0027t\nunregister its devlink params, which leads to this WARN[1].\nFix it by unregistering devlink params in that case as well.\n\n[1]\n[  295.244769 ] WARNING: CPU: 15 PID: 1 at net/core/devlink.c:9042 devlink_free+0x174/0x1fc\n[  295.488379 ] CPU: 15 PID: 1 Comm: shutdown Tainted: G S         OE 5.15.0-1017.19.3.g0677e61-bluefield #g0677e61\n[  295.509330 ] Hardware name: https://www.mellanox.com BlueField SoC/BlueField SoC, BIOS 4.2.0.12761 Jun  6 2023\n[  295.543096 ] pc : devlink_free+0x174/0x1fc\n[  295.551104 ] lr : mlx5_devlink_free+0x18/0x2c [mlx5_core]\n[  295.561816 ] sp : ffff80000809b850\n[  295.711155 ] Call trace:\n[  295.716030 ]  devlink_free+0x174/0x1fc\n[  295.723346 ]  mlx5_devlink_free+0x18/0x2c [mlx5_core]\n[  295.733351 ]  mlx5_sf_dev_remove+0x98/0xb0 [mlx5_core]\n[  295.743534 ]  auxiliary_bus_remove+0x2c/0x50\n[  295.751893 ]  __device_release_driver+0x19c/0x280\n[  295.761120 ]  device_release_driver+0x34/0x50\n[  295.769649 ]  bus_remove_device+0xdc/0x170\n[  295.777656 ]  device_del+0x17c/0x3a4\n[  295.784620 ]  mlx5_sf_dev_remove+0x28/0xf0 [mlx5_core]\n[  295.794800 ]  mlx5_sf_dev_table_destroy+0x98/0x110 [mlx5_core]\n[  295.806375 ]  mlx5_unload+0x34/0xd0 [mlx5_core]\n[  295.815339 ]  mlx5_unload_one+0x70/0xe4 [mlx5_core]\n[  295.824998 ]  shutdown+0xb0/0xd8 [mlx5_core]\n[  295.833439 ]  pci_device_shutdown+0x3c/0xa0\n[  295.841651 ]  device_shutdown+0x170/0x340\n[  295.849486 ]  __do_sys_reboot+0x1f4/0x2a0\n[  295.857322 ]  __arm64_sys_reboot+0x2c/0x40\n[  295.865329 ]  invoke_syscall+0x78/0x100\n[  295.872817 ]  el0_svc_common.constprop.0+0x54/0x184\n[  295.882392 ]  do_el0_svc+0x30/0xac\n[  295.889008 ]  el0_svc+0x48/0x160\n[  295.895278 ]  el0t_64_sync_handler+0xa4/0x130\n[  295.903807 ]  el0t_64_sync+0x1a4/0x1a8\n[  295.911120 ] ---[ end trace 4f1d2381d00d9dce  ]---"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt7601u: fix an integer underflow\n\nFix an integer underflow that leads to a null pointer dereference in\n\u0027mt7601u_rx_skb_from_seg()\u0027. The variable \u0027dma_len\u0027 in the URB packet\ncould be manipulated, which could trigger an integer underflow of\n\u0027seg_len\u0027 in \u0027mt7601u_rx_process_seg()\u0027. This underflow subsequently\ncauses the \u0027bad_frame\u0027 checks in \u0027mt7601u_rx_skb_from_seg()\u0027 to be\nbypassed, eventually leading to a dereference of the pointer \u0027p\u0027, which\nis a null pointer.\n\nEnsure that \u0027dma_len\u0027 is greater than \u0027min_seg_len\u0027.\n\nFound by a modified version of syzkaller.\n\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 PID: 12 Comm: ksoftirqd/0 Tainted: G        W  O      5.14.0+\n#139\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nrel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014\nRIP: 0010:skb_add_rx_frag+0x143/0x370\nCode: e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 86 01 00 00 4c 8d 7d 08 44\n89 68 08 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 \u003c80\u003e 3c 02\n00 0f 85 cd 01 00 00 48 8b 45 08 a8 01 0f 85 3d 01 00 00\nRSP: 0018:ffffc900000cfc90 EFLAGS: 00010202\nRAX: dffffc0000000000 RBX: ffff888115520dc0 RCX: 0000000000000000\nRDX: 0000000000000001 RSI: ffff8881118430c0 RDI: ffff8881118430f8\nRBP: 0000000000000000 R08: 0000000000000e09 R09: 0000000000000010\nR10: ffff888111843017 R11: ffffed1022308602 R12: 0000000000000000\nR13: 0000000000000e09 R14: 0000000000000010 R15: 0000000000000008\nFS:  0000000000000000(0000) GS:ffff88811a800000(0000)\nknlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000004035af40 CR3: 00000001157f2000 CR4: 0000000000750ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n mt7601u_rx_tasklet+0xc73/0x1270\n ? mt7601u_submit_rx_buf.isra.0+0x510/0x510\n ? tasklet_action_common.isra.0+0x79/0x2f0\n tasklet_action_common.isra.0+0x206/0x2f0\n __do_softirq+0x1b5/0x880\n ? tasklet_unlock+0x30/0x30\n run_ksoftirqd+0x26/0x50\n smpboot_thread_fn+0x34f/0x7d0\n ? smpboot_register_percpu_thread+0x370/0x370\n kthread+0x3a1/0x480\n ? set_kthread_struct+0x120/0x120\n ret_from_fork+0x1f/0x30\nModules linked in: 88XXau(O) 88x2bu(O)\n---[ end trace 57f34f93b4da0f9b ]---\nRIP: 0010:skb_add_rx_frag+0x143/0x370\nCode: e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 86 01 00 00 4c 8d 7d 08 44\n89 68 08 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 \u003c80\u003e 3c 02\n00 0f 85 cd 01 00 00 48 8b 45 08 a8 01 0f 85 3d 01 00 00\nRSP: 0018:ffffc900000cfc90 EFLAGS: 00010202\nRAX: dffffc0000000000 RBX: ffff888115520dc0 RCX: 0000000000000000\nRDX: 0000000000000001 RSI: ffff8881118430c0 RDI: ffff8881118430f8\nRBP: 0000000000000000 R08: 0000000000000e09 R09: 0000000000000010\nR10: ffff888111843017 R11: ffffed1022308602 R12: 0000000000000000\nR13: 0000000000000e09 R14: 0000000000000010 R15: 0000000000000008\nFS:  0000000000000000(0000) GS:ffff88811a800000(0000)\nknlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000004035af40 CR3: 00000001157f2000 CR4: 0000000000750ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/gvt: fix vgpu debugfs clean in remove\n\nCheck carefully on root debugfs available when destroying vgpu,\ne.g in remove case drm minor\u0027s debugfs root might already be destroyed,\nwhich led to kernel oops like below.\n\nConsole: switching to colour dummy device 80x25\ni915 0000:00:02.0: MDEV: Unregistering\nintel_vgpu_mdev b1338b2d-a709-4c23-b766-cc436c36cdf0: Removing from iommu group 14\nBUG: kernel NULL pointer dereference, address: 0000000000000150\nPGD 0 P4D 0\nOops: 0000 [#1] PREEMPT SMP\nCPU: 3 PID: 1046 Comm: driverctl Not tainted 6.1.0-rc2+ #6\nHardware name: HP HP ProDesk 600 G3 MT/829D, BIOS P02 Ver. 02.44 09/13/2022\nRIP: 0010:__lock_acquire+0x5e2/0x1f90\nCode: 87 ad 09 00 00 39 05 e1 1e cc 02 0f 82 f1 09 00 00 ba 01 00 00 00 48 83 c4 48 89 d0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ff \u003c48\u003e 81 3f 60 9e c2 b6 45 0f 45 f8 83 fe 01 0f 87 55 fa ff ff 89 f0\nRSP: 0018:ffff9f770274f948 EFLAGS: 00010046\nRAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000150\nRBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000\nR10: ffff8895d1173300 R11: 0000000000000001 R12: 0000000000000000\nR13: 0000000000000150 R14: 0000000000000000 R15: 0000000000000000\nFS:  00007fc9b2ba0740(0000) GS:ffff889cdfcc0000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000150 CR3: 000000010fd93005 CR4: 00000000003706e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n lock_acquire+0xbf/0x2b0\n ? simple_recursive_removal+0xa5/0x2b0\n ? lock_release+0x13d/0x2d0\n down_write+0x2a/0xd0\n ? simple_recursive_removal+0xa5/0x2b0\n simple_recursive_removal+0xa5/0x2b0\n ? start_creating.part.0+0x110/0x110\n ? _raw_spin_unlock+0x29/0x40\n debugfs_remove+0x40/0x60\n intel_gvt_debugfs_remove_vgpu+0x15/0x30 [kvmgt]\n intel_gvt_destroy_vgpu+0x60/0x100 [kvmgt]\n intel_vgpu_release_dev+0xe/0x20 [kvmgt]\n device_release+0x30/0x80\n kobject_put+0x79/0x1b0\n device_release_driver_internal+0x1b8/0x230\n bus_remove_device+0xec/0x160\n device_del+0x189/0x400\n ? up_write+0x9c/0x1b0\n ? mdev_device_remove_common+0x60/0x60 [mdev]\n mdev_device_remove_common+0x22/0x60 [mdev]\n mdev_device_remove_cb+0x17/0x20 [mdev]\n device_for_each_child+0x56/0x80\n mdev_unregister_parent+0x5a/0x81 [mdev]\n intel_gvt_clean_device+0x2d/0xe0 [kvmgt]\n intel_gvt_driver_remove+0x2e/0xb0 [i915]\n i915_driver_remove+0xac/0x100 [i915]\n i915_pci_remove+0x1a/0x30 [i915]\n pci_device_remove+0x31/0xa0\n device_release_driver_internal+0x1b8/0x230\n unbind_store+0xd8/0x100\n kernfs_fop_write_iter+0x156/0x210\n vfs_write+0x236/0x4a0\n ksys_write+0x61/0xd0\n do_syscall_64+0x55/0x80\n ? find_held_lock+0x2b/0x80\n ? lock_release+0x13d/0x2d0\n ? up_read+0x17/0x20\n ? lock_is_held_type+0xe3/0x140\n ? asm_exc_page_fault+0x22/0x30\n ? lockdep_hardirqs_on+0x7d/0x100\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7fc9b2c9e0c4\nCode: 15 71 7d 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 80 3d 3d 05 0e 00 00 74 13 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 54 c3 0f 1f 00 48 83 ec 28 48 89 54 24 18 48\nRSP: 002b:00007ffec29c81c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 000000000000000d RCX: 00007fc9b2c9e0c4\nRDX: 000000000000000d RSI: 0000559f8b5f48a0 RDI: 0000000000000001\nRBP: 0000559f8b5f48a0 R08: 0000559f8b5f3540 R09: 00007fc9b2d76d30\nR10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000d\nR13: 00007fc9b2d77780 R14: 000000000000000d R15: 00007fc9b2d72a00\n \u003c/TASK\u003e\nModules linked in: sunrpc intel_rapl_msr intel_rapl_common intel_pmc_core_pltdrv intel_pmc_core intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ee1004 igbvf rapl vfat fat intel_cstate intel_uncore pktcdvd i2c_i801 pcspkr wmi_bmof i2c_smbus acpi_pad vfio_pci vfio_pci_core vfio_virqfd zram fuse dm\n---truncated---"
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      "title": "drm/i915/gvt: fix vgpu debugfs clean in remove",
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              "confidentialityImpact": "NONE",
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              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: Fix NPD when refreshing an FDB entry with a nexthop object\n\nVXLAN FDB entries can point to either a remote destination or an FDB\nnexthop group. The latter is usually used in EVPN deployments where\nlearning is disabled.\n\nHowever, when learning is enabled, an incoming packet might try to\nrefresh an FDB entry that points to an FDB nexthop group and therefore\ndoes not have a remote. Such packets should be dropped, but they are\nonly dropped after dereferencing the non-existent remote, resulting in a\nNPD [1] which can be reproduced using [2].\n\nFix by dropping such packets earlier. Remove the misleading comment from\nfirst_remote_rcu().\n\n[1]\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n[...]\nCPU: 13 UID: 0 PID: 361 Comm: mausezahn Not tainted 6.17.0-rc1-virtme-g9f6b606b6b37 #1 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-4.fc41 04/01/2014\nRIP: 0010:vxlan_snoop+0x98/0x1e0\n[...]\nCall Trace:\n \u003cTASK\u003e\n vxlan_encap_bypass+0x209/0x240\n encap_bypass_if_local+0xb1/0x100\n vxlan_xmit_one+0x1375/0x17e0\n vxlan_xmit+0x6b4/0x15f0\n dev_hard_start_xmit+0x5d/0x1c0\n __dev_queue_xmit+0x246/0xfd0\n packet_sendmsg+0x113a/0x1850\n __sock_sendmsg+0x38/0x70\n __sys_sendto+0x126/0x180\n __x64_sys_sendto+0x24/0x30\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\n[2]\n #!/bin/bash\n\n ip address add 192.0.2.1/32 dev lo\n ip address add 192.0.2.2/32 dev lo\n\n ip nexthop add id 1 via 192.0.2.3 fdb\n ip nexthop add id 10 group 1 fdb\n\n ip link add name vx0 up type vxlan id 10010 local 192.0.2.1 dstport 12345 localbypass\n ip link add name vx1 up type vxlan id 10020 local 192.0.2.2 dstport 54321 learning\n\n bridge fdb add 00:11:22:33:44:55 dev vx0 self static dst 192.0.2.2 port 54321 vni 10020\n bridge fdb add 00:aa:bb:cc:dd:ee dev vx1 self static nhid 10\n\n mausezahn vx0 -a 00:aa:bb:cc:dd:ee -b 00:11:22:33:44:55 -c 1 -q"
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              "value": "AV:L - The malicious input arrives as a `VIRTCHNL_OP_CONFIG_VSI_QUEUES` message on the SR-IOV VF\u2192PF admin-queue mailbox, a PCIe transport, not a network protocol. The attacker needs local control of an assigned VF (guest VM or VF-owning container), so this is local reachability rather than network or adjacent.\nAC:L - The attacker fully controls every input \u2014 `num_tc` and per-TC `count` via ENABLE_CHANNELS, then `num_queue_pairs` and the qpair array via CONFIG_VSI_QUEUES \u2014 so shrinking `num_tc` to leave stale `ch[]` entries and then walking `idx` into them is deterministic on the first attempt with no memory grooming or race. The only precondition, spoofchk disabled, is inherent to any ADq-enabled SR-IOV deployment and is a standard runtime configuration.\nPR:L - The attacker only needs to drive the VF\u0027s admin queue \u2014 kernel/root inside the assigned guest, or possession of the VFIO device \u2014 which is a low-privileged position relative to the host PF driver under attack. No privileges of any kind on the host are required.\nUI:N - The malicious VF sends the virtchnl message sequence entirely on its own initiative. No host administrator or other user action is needed at any stage.\nS:C - The attacking VF sits in a guest VM (or VF-assigned container) while the stale-index read and the resulting hardware queue-context programming occur in the host PF driver\u0027s security authority. The corrupted resources \u2014 HMC LAN Tx/Rx contexts and QTX_CTL bindings of VSIs belonging to the PF or to other VFs \u2014 are outside the attacker\u0027s scope, crossing the guest/host and inter-tenant SR-IOV boundary.\nC:H - Using a stale `ch[idx].vsi_id`, the VF resolves and reprograms the Rx queue context of a VSI it does not own, setting `rx_ctx.base` from its own `dma_ring_addr` so another VSI\u0027s received traffic is DMA\u0027d into attacker-designated memory \u2014 interception of host and cross-guest traffic. On pre-5.2 kernels the same defect additionally reads past the end of `vf-\u003ech[]` into adjacent `struct i40e_vf` state.\nI:H - `i40e_config_vsi_rx_queue()` performs no ownership check and `i40e_config_vsi_tx_queue()` validates only the VF-supplied `info-\u003evsi_id`, so the stale ID lets the VF clear and rewrite the LAN HMC Tx/Rx contexts of a foreign VSI\u0027s queues and issue a `QTX_CTL` write rebinding that PF queue to itself. This is attacker-controlled modification of host- and peer-owned hardware state.\nA:H - Clearing and rewriting queue contexts belonging to the PF\u0027s main VSI or another guest\u0027s VSI stalls or wedges those queues, and out-of-range `pf_queue_id` values (`I40E_QUEUE_END_OF_LIST`) drive HMC operations that trigger adapter error paths, PF/VF reset storms and loss of host networking. The VF can repeat the sequence at will, and a downed host PF takes every guest on the adapter with it."
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    "datePublished": "2025-10-15T07:55:54.270Z",
    "dateReserved": "2025-04-16T07:20:57.149Z",
    "dateUpdated": "2026-08-05T12:06:40.599Z",
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              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: cpumap: Fix memory leak in cpu_map_update_elem\n\nSyzkaller reported a memory leak as follows:\n\nBUG: memory leak\nunreferenced object 0xff110001198ef748 (size 192):\n  comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n  hex dump (first 32 bytes):\n    00 00 00 00 4a 19 00 00 80 ad e3 e4 fe ff c0 00  ....J...........\n    00 b2 d3 0c 01 00 11 ff 28 f5 8e 19 01 00 11 ff  ........(.......\n  backtrace:\n    [\u003cffffffffadd28087\u003e] __cpu_map_entry_alloc+0xf7/0xb00\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nBUG: memory leak\nunreferenced object 0xff110001198ef528 (size 192):\n  comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [\u003cffffffffadd281f0\u003e] __cpu_map_entry_alloc+0x260/0xb00\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nBUG: memory leak\nunreferenced object 0xff1100010fd93d68 (size 8):\n  comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n  hex dump (first 8 bytes):\n    00 00 00 00 00 00 00 00                          ........\n  backtrace:\n    [\u003cffffffffade5db3e\u003e] kvmalloc_node+0x11e/0x170\n    [\u003cffffffffadd28280\u003e] __cpu_map_entry_alloc+0x2f0/0xb00\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nIn the cpu_map_update_elem flow, when kthread_stop is called before\ncalling the threadfn of rcpu-\u003ekthread, since the KTHREAD_SHOULD_STOP bit\nof kthread has been set by kthread_stop, the threadfn of rcpu-\u003ekthread\nwill never be executed, and rcpu-\u003erefcnt will never be 0, which will\nlead to the allocated rcpu, rcpu-\u003equeue and rcpu-\u003equeue-\u003equeue cannot be\nreleased.\n\nCalling kthread_stop before executing kthread\u0027s threadfn will return\n-EINTR. We can complete the release of memory resources in this state."
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          "product": "Linux",
          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: vmbus: Don\u0027t dereference ACPI root object handle\n\nSince the commit referenced in the Fixes: tag below the VMBus client driver\nis walking the ACPI namespace up from the VMBus ACPI device to the ACPI\nnamespace root object trying to find Hyper-V MMIO ranges.\n\nHowever, if it is not able to find them it ends trying to walk resources of\nthe ACPI namespace root object itself.\nThis object has all-ones handle, which causes a NULL pointer dereference\nin the ACPI code (from dereferencing this pointer with an offset).\n\nThis in turn causes an oops on boot with VMBus host implementations that do\nnot provide Hyper-V MMIO ranges in their VMBus ACPI device or its\nancestors.\nThe QEMU VMBus implementation is an example of such implementation.\n\nI guess providing these ranges is optional, since all tested Windows\nversions seem to be able to use VMBus devices without them.\n\nFix this by explicitly terminating the lookup at the ACPI namespace root\nobject.\n\nNote that Linux guests under KVM/QEMU do not use the Hyper-V PV interface\nby default - they only do so if the KVM PV interface is missing or\ndisabled.\n\nExample stack trace of such oops:\n[ 3.710827] ? __die+0x1f/0x60\n[ 3.715030] ? page_fault_oops+0x159/0x460\n[ 3.716008] ? exc_page_fault+0x73/0x170\n[ 3.716959] ? asm_exc_page_fault+0x22/0x30\n[ 3.717957] ? acpi_ns_lookup+0x7a/0x4b0\n[ 3.718898] ? acpi_ns_internalize_name+0x79/0xc0\n[ 3.720018] acpi_ns_get_node_unlocked+0xb5/0xe0\n[ 3.721120] ? acpi_ns_check_object_type+0xfe/0x200\n[ 3.722285] ? acpi_rs_convert_aml_to_resource+0x37/0x6e0\n[ 3.723559] ? down_timeout+0x3a/0x60\n[ 3.724455] ? acpi_ns_get_node+0x3a/0x60\n[ 3.725412] acpi_ns_get_node+0x3a/0x60\n[ 3.726335] acpi_ns_evaluate+0x1c3/0x2c0\n[ 3.727295] acpi_ut_evaluate_object+0x64/0x1b0\n[ 3.728400] acpi_rs_get_method_data+0x2b/0x70\n[ 3.729476] ? vmbus_platform_driver_probe+0x1d0/0x1d0 [hv_vmbus]\n[ 3.730940] ? vmbus_platform_driver_probe+0x1d0/0x1d0 [hv_vmbus]\n[ 3.732411] acpi_walk_resources+0x78/0xd0\n[ 3.733398] vmbus_platform_driver_probe+0x9f/0x1d0 [hv_vmbus]\n[ 3.734802] platform_probe+0x3d/0x90\n[ 3.735684] really_probe+0x19b/0x400\n[ 3.736570] ? __device_attach_driver+0x100/0x100\n[ 3.737697] __driver_probe_device+0x78/0x160\n[ 3.738746] driver_probe_device+0x1f/0x90\n[ 3.739743] __driver_attach+0xc2/0x1b0\n[ 3.740671] bus_for_each_dev+0x70/0xc0\n[ 3.741601] bus_add_driver+0x10e/0x210\n[ 3.742527] driver_register+0x55/0xf0\n[ 3.744412] ? 0xffffffffc039a000\n[ 3.745207] hv_acpi_init+0x3c/0x1000 [hv_vmbus]"
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        {
          "url": "https://git.kernel.org/stable/c/78e04bbff849b51b56f5925b1945db2c6e128b61"
        }
      ],
      "title": "Drivers: hv: vmbus: Don\u0027t dereference ACPI root object handle",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53647",
    "datePublished": "2025-10-07T15:19:45.083Z",
    "dateReserved": "2025-10-07T15:16:59.659Z",
    "dateUpdated": "2026-05-11T19:49:12.279Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/damon/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "da7beebb49c643cd03c54447ed66595936a7a1ce",
              "status": "affected",
              "version": "98def236f63c66629fb6b2d4b69cecffc5b46539",
              "versionType": "git"
            },
            {
              "lessThan": "5f1fc67f2cb8d3035d3acd273b48b97835af8afd",
              "status": "affected",
              "version": "98def236f63c66629fb6b2d4b69cecffc5b46539",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/damon/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "lessThan": "6.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.11",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: initialize damo_filter-\u003elist from damos_new_filter()\n\ndamos_new_filter() is not initializing the list field of newly allocated\nfilter object.  However, DAMON sysfs interface and DAMON_RECLAIM are not\ninitializing it after calling damos_new_filter().  As a result, accessing\nuninitialized memory is possible.  Actually, adding multiple DAMOS filters\nvia DAMON sysfs interface caused NULL pointer dereferencing.  Initialize\nthe field just after the allocation from damos_new_filter()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:47:14.324Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/da7beebb49c643cd03c54447ed66595936a7a1ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/5f1fc67f2cb8d3035d3acd273b48b97835af8afd"
        }
      ],
      "title": "mm/damon/core: initialize damo_filter-\u003elist from damos_new_filter()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53555",
    "datePublished": "2025-10-04T15:17:00.514Z",
    "dateReserved": "2025-10-04T15:14:15.922Z",
    "dateUpdated": "2026-05-11T19:47:14.324Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}