{
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          ],
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            },
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              "version": "6.6.130",
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            {
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              "version": "6.18.19",
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              "version": "6.19.9",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: storvsc: Fix scheduling while atomic on PREEMPT_RT\n\nThis resolves the follow splat and lock-up when running with PREEMPT_RT\nenabled on Hyper-V:\n\n[  415.140818] BUG: scheduling while atomic: stress-ng-iomix/1048/0x00000002\n[  415.140822] INFO: lockdep is turned off.\n[  415.140823] Modules linked in: intel_rapl_msr intel_rapl_common intel_uncore_frequency_common intel_pmc_core pmt_telemetry pmt_discovery pmt_class intel_pmc_ssram_telemetry intel_vsec ghash_clmulni_intel aesni_intel rapl binfmt_misc nls_ascii nls_cp437 vfat fat snd_pcm hyperv_drm snd_timer drm_client_lib drm_shmem_helper snd sg soundcore drm_kms_helper pcspkr hv_balloon hv_utils evdev joydev drm configfs efi_pstore nfnetlink vsock_loopback vmw_vsock_virtio_transport_common hv_sock vmw_vsock_vmci_transport vsock vmw_vmci efivarfs autofs4 ext4 crc16 mbcache jbd2 sr_mod sd_mod cdrom hv_storvsc serio_raw hid_generic scsi_transport_fc hid_hyperv scsi_mod hid hv_netvsc hyperv_keyboard scsi_common\n[  415.140846] Preemption disabled at:\n[  415.140847] [\u003cffffffffc0656171\u003e] storvsc_queuecommand+0x2e1/0xbe0 [hv_storvsc]\n[  415.140854] CPU: 8 UID: 0 PID: 1048 Comm: stress-ng-iomix Not tainted 6.19.0-rc7 #30 PREEMPT_{RT,(full)}\n[  415.140856] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 09/04/2024\n[  415.140857] Call Trace:\n[  415.140861]  \u003cTASK\u003e\n[  415.140861]  ? storvsc_queuecommand+0x2e1/0xbe0 [hv_storvsc]\n[  415.140863]  dump_stack_lvl+0x91/0xb0\n[  415.140870]  __schedule_bug+0x9c/0xc0\n[  415.140875]  __schedule+0xdf6/0x1300\n[  415.140877]  ? rtlock_slowlock_locked+0x56c/0x1980\n[  415.140879]  ? rcu_is_watching+0x12/0x60\n[  415.140883]  schedule_rtlock+0x21/0x40\n[  415.140885]  rtlock_slowlock_locked+0x502/0x1980\n[  415.140891]  rt_spin_lock+0x89/0x1e0\n[  415.140893]  hv_ringbuffer_write+0x87/0x2a0\n[  415.140899]  vmbus_sendpacket_mpb_desc+0xb6/0xe0\n[  415.140900]  ? rcu_is_watching+0x12/0x60\n[  415.140902]  storvsc_queuecommand+0x669/0xbe0 [hv_storvsc]\n[  415.140904]  ? HARDIRQ_verbose+0x10/0x10\n[  415.140908]  ? __rq_qos_issue+0x28/0x40\n[  415.140911]  scsi_queue_rq+0x760/0xd80 [scsi_mod]\n[  415.140926]  __blk_mq_issue_directly+0x4a/0xc0\n[  415.140928]  blk_mq_issue_direct+0x87/0x2b0\n[  415.140931]  blk_mq_dispatch_queue_requests+0x120/0x440\n[  415.140933]  blk_mq_flush_plug_list+0x7a/0x1a0\n[  415.140935]  __blk_flush_plug+0xf4/0x150\n[  415.140940]  __submit_bio+0x2b2/0x5c0\n[  415.140944]  ? submit_bio_noacct_nocheck+0x272/0x360\n[  415.140946]  submit_bio_noacct_nocheck+0x272/0x360\n[  415.140951]  ext4_read_bh_lock+0x3e/0x60 [ext4]\n[  415.140995]  ext4_block_write_begin+0x396/0x650 [ext4]\n[  415.141018]  ? __pfx_ext4_da_get_block_prep+0x10/0x10 [ext4]\n[  415.141038]  ext4_da_write_begin+0x1c4/0x350 [ext4]\n[  415.141060]  generic_perform_write+0x14e/0x2c0\n[  415.141065]  ext4_buffered_write_iter+0x6b/0x120 [ext4]\n[  415.141083]  vfs_write+0x2ca/0x570\n[  415.141087]  ksys_write+0x76/0xf0\n[  415.141089]  do_syscall_64+0x99/0x1490\n[  415.141093]  ? rcu_is_watching+0x12/0x60\n[  415.141095]  ? finish_task_switch.isra.0+0xdf/0x3d0\n[  415.141097]  ? rcu_is_watching+0x12/0x60\n[  415.141098]  ? lock_release+0x1f0/0x2a0\n[  415.141100]  ? rcu_is_watching+0x12/0x60\n[  415.141101]  ? finish_task_switch.isra.0+0xe4/0x3d0\n[  415.141103]  ? rcu_is_watching+0x12/0x60\n[  415.141104]  ? __schedule+0xb34/0x1300\n[  415.141106]  ? hrtimer_try_to_cancel+0x1d/0x170\n[  415.141109]  ? do_nanosleep+0x8b/0x160\n[  415.141111]  ? hrtimer_nanosleep+0x89/0x100\n[  415.141114]  ? __pfx_hrtimer_wakeup+0x10/0x10\n[  415.141116]  ? xfd_validate_state+0x26/0x90\n[  415.141118]  ? rcu_is_watching+0x12/0x60\n[  415.141120]  ? do_syscall_64+0x1e0/0x1490\n[  415.141121]  ? do_syscall_64+0x1e0/0x1490\n[  415.141123]  ? rcu_is_watching+0x12/0x60\n[  415.141124]  ? do_syscall_64+0x1e0/0x1490\n[  415.141125]  ? do_syscall_64+0x1e0/0x1490\n[  415.141127]  ? irqentry_exit+0x140/0\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:25:19.772Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/cf00cb15f2515e38d3b7571bf6800b7c6ce70a84"
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        {
          "url": "https://git.kernel.org/stable/c/b82462af23e45e066dd56d2736ea70159a6ad647"
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          "url": "https://git.kernel.org/stable/c/91ab59f76d0866079420ebff1c7959fcd87a242e"
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          "url": "https://git.kernel.org/stable/c/e7919a293f9b6101e38bde0d8613daea6c9955df"
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          "url": "https://git.kernel.org/stable/c/f8db760f4f52a73a022a3d6c84c488ead952a9b5"
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          "url": "https://git.kernel.org/stable/c/c7984d196476adcbd51c0ce386d7e90277198d57"
        },
        {
          "url": "https://git.kernel.org/stable/c/57297736c08233987e5d29ce6584c6ca2a831b12"
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      ],
      "title": "scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43475",
    "datePublished": "2026-05-08T14:22:33.553Z",
    "dateReserved": "2026-05-01T14:12:56.011Z",
    "dateUpdated": "2026-05-11T22:25:19.772Z",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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        }
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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"
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          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached only through DRM_IOCTL_AMDGPU_CS on an AMDGPU render node (/dev/dri/renderD*), requiring a local ioctl from userspace to submit command streams with a user fence chunk to the VCN v4.0.3 unified encoder ring.\nAC:L - On affected VCN 4.0.3 hardware, an attacker fully controls CS submission parameters (fence GEM handle, offset, and VCN_ENC ring IB) and can reliably trigger the unsupported 64-bit user fence path without races or external timing dependencies.\nPR:L - DRM_IOCTL_AMDGPU_CS is gated by DRM_AUTH|DRM_RENDER_ALLOW, so any unprivileged local user with render-node access (typically membership in the render group) can reach the vulnerable path without root or special capabilities.\nUI:N - Exploitation requires only programmatic ioctl submission; no victim interaction such as opening files, mounting filesystems, or clicking prompts is needed.\nS:U - The flaw enables GPU-initiated memory corruption within the attacker\u0027s own AMDGPU context/VM via the render node, which is a standard local kernel/GPU-driver privilege boundary rather than a cross-authority escape such as VM guest-to-host or IOMMU bypass.\nC:H - Submitting a 64-bit user fence to a ring that only supports 32-bit fence writes causes the VCN hardware to perform misdirected or out-of-bounds GPU memory writes, providing a memory-corruption primitive that can be leveraged for information disclosure.\nI:H - The unsupported fence write gives the attacker a GPU-initiated arbitrary-write primitive at attacker-chosen GPU virtual addresses within their VM mappings, which is memory corruption exploitable for further integrity compromise or code execution.\nA:H - Incorrect fence handling on the VCN encoder ring can hang or fault the GPU, trigger driver error-recovery paths, and cause system-wide graphics disruption or kernel oops, constituting high availability impact."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:36:30.612Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/387b7c7667bd5c53549350ddad866d2fcf75a529"
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        {
          "url": "https://git.kernel.org/stable/c/9076a83e5adefd10dc5c967c7b8bde601c4c512a"
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        },
        {
          "url": "https://git.kernel.org/stable/c/4532b52b34e4e4310386e6fdf6a643368599f522"
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      ],
      "title": "drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 enc ring",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63852",
    "datePublished": "2026-07-19T14:04:43.258Z",
    "dateReserved": "2026-07-19T07:54:57.016Z",
    "dateUpdated": "2026-08-05T12:36:30.612Z",
    "state": "PUBLISHED"
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_ct.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: avoid NULL deref of conn-\u003elnk in smc_msg_event tracepoint\n\nThe smc_msg_event tracepoint class, shared by smc_tx_sendmsg and\nsmc_rx_recvmsg, unconditionally dereferences smc-\u003econn.lnk:\n\n\t__string(name, smc-\u003econn.lnk-\u003eibname)\n\nconn-\u003elnk is only set for SMC-R; for SMC-D it is NULL. Other code on\nthese paths already handles this (e.g. !conn-\u003elnk in\nSMC_STAT_RMB_TX_SIZE_SMALL()). With the tracepoint enabled, the first\nsendmsg()/recvmsg() on an SMC-D socket crashes:\n\n  Oops: general protection fault, probably for non-canonical address\n  KASAN: null-ptr-deref in range [...]\n  RIP: 0010:strlen+0x1e/0xa0\n  Call Trace:\n   trace_event_raw_event_smc_msg_event (net/smc/smc_tracepoint.h:44)\n   smc_rx_recvmsg (net/smc/smc_rx.c:515)\n   smc_recvmsg (net/smc/af_smc.c:2859)\n   __sys_recvfrom (net/socket.c:2315)\n   __x64_sys_recvfrom (net/socket.c:2326)\n   do_syscall_64\n\nThe faulting address 0x3e0 is offsetof(struct smc_link, ibname),\nconfirming the NULL -\u003elnk deref. Enabling the tracepoint requires\nroot, but the trigger itself is unprivileged: socket(AF_SMC, ...) has\nno capability check, and SMC-D negotiation needs no admin step on\ns390 or on x86 with the loopback ISM device loaded.\n\nLog an empty device name for SMC-D instead of dereferencing NULL."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix ip_rt_bug race in icmp_route_lookup reverse path\n\nicmp_route_lookup() performs multiple route lookups to find a suitable\nroute for sending ICMP error messages, with special handling for XFRM\n(IPsec) policies.\n\nThe lookup sequence is:\n1. First, lookup output route for ICMP reply (dst = original src)\n2. Pass through xfrm_lookup() for policy check\n3. If blocked (-EPERM) or dst is not local, enter \"reverse path\"\n4. In reverse path, call xfrm_decode_session_reverse() to get fl4_dec\n   which reverses the original packet\u0027s flow (saddr\u003c-\u003edaddr swapped)\n5. If fl4_dec.saddr is local (we are the original destination), use\n   __ip_route_output_key() for output route lookup\n6. If fl4_dec.saddr is NOT local (we are a forwarding node), use\n   ip_route_input() to simulate the reverse packet\u0027s input path\n7. Finally, pass rt2 through xfrm_lookup() with XFRM_LOOKUP_ICMP flag\n\nThe bug occurs in step 6: ip_route_input() is called with fl4_dec.daddr\n(original packet\u0027s source) as destination. If this address becomes local\nbetween the initial check and ip_route_input() call (e.g., due to\nconcurrent \"ip addr add\"), ip_route_input() returns a LOCAL route with\ndst.output set to ip_rt_bug.\n\nThis route is then used for ICMP output, causing dst_output() to call\nip_rt_bug(), triggering a WARN_ON:\n\n ------------[ cut here ]------------\n WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x21/0x30, CPU#1\n Call Trace:\n  \u003cTASK\u003e\n  ip_push_pending_frames+0x202/0x240\n  icmp_push_reply+0x30d/0x430\n  __icmp_send+0x1149/0x24f0\n  ip_options_compile+0xa2/0xd0\n  ip_rcv_finish_core+0x829/0x1950\n  ip_rcv+0x2d7/0x420\n  __netif_receive_skb_one_core+0x185/0x1f0\n  netif_receive_skb+0x90/0x450\n  tun_get_user+0x3413/0x3fb0\n  tun_chr_write_iter+0xe4/0x220\n  ...\n\nFix this by checking rt2-\u003ert_type after ip_route_input(). If it\u0027s\nRTN_LOCAL, the route cannot be used for output, so treat it as an error.\n\nThe reproducer requires kernel modification to widen the race window,\nmaking it unsuitable as a selftest. It is available at:\n\n  https://gist.github.com/mrpre/eae853b72ac6a750f5d45d64ddac1e81"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: fix race between dump and ip_set_list resize\n\nThe release path of ip_set_dump_do() and ip_set_dump_done() read\ninst-\u003eip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw()\nof the array pointer. These run from netlink_recvmsg() without the nfnl\nmutex and without an RCU read-side critical section.\n\nA concurrent ip_set_create() can grow the array: it publishes the new\narray, calls synchronize_net() and then kvfree()s the old one. Since the\ndump paths read the array outside any RCU reader, synchronize_net() does\nnot wait for them and the old array can be freed while they still index\ninto it, causing a use-after-free.\n\nThe dumped set itself stays pinned via set-\u003eref_netlink, so only the\narray load needs protecting. Take rcu_read_lock() around it, matching\nip_set_get_byname() and __ip_set_put_byindex().\n\n  BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n  Read of size 8 at addr ffff88800b5c4018 by task exploit/150\n  Call Trace:\n   ...\n   kasan_report (mm/kasan/report.c:595)\n   ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n   netlink_dump (net/netlink/af_netlink.c:2325)\n   netlink_recvmsg (net/netlink/af_netlink.c:1976)\n   sock_recvmsg (net/socket.c:1159)\n   __sys_recvfrom (net/socket.c:2315)\n   ...\n  Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI\n  KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7]\n  RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698)\n  Kernel panic - not syncing: Fatal exception"
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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",
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              "value": "AV:L - The vulnerable dump and resize paths are reached through local NETLINK_NETFILTER send and receive syscalls, not through remotely received packets.\nAC:L - The attacker controls both sides by issuing an ipset dump and concurrent CREATE requests that grow ip_set_list, and can repeat the race without any victim-controlled condition.\nPR:L - NFNETLINK requires CAP_NET_ADMIN in the network namespace\u0027s owning user namespace, which an unprivileged user can obtain through user and network namespaces on deployments permitting unprivileged user namespaces.\nUI:N - After obtaining local execution, the attacker can trigger both racing operations without any action by another user.\nS:U - Exploitation compromises the kernel of the same host and constitutes standard local privilege escalation rather than crossing a VM, hypervisor, or IOMMU boundary.\nC:H - Reclaiming the freed array can make the loaded struct ip_set pointer attacker-influenced, after which variant-pointer dereferences can enable kernel code execution and arbitrary memory disclosure.\nI:H - The release path performs an indirect uref callback and decrements ref_netlink through the stale pointer, providing control-flow and kernel-memory-write opportunities after heap reclamation.\nA:H - The reported use-after-free produced a general-protection fault and kernel panic, and an attacker can trigger the race repeatedly."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptrace: slightly saner \u0027get_dumpable()\u0027 logic\n\nThe \u0027dumpability\u0027 of a task is fundamentally about the memory image of\nthe task - the concept comes from whether it can core dump or not - and\nmakes no sense when you don\u0027t have an associated mm.\n\nAnd almost all users do in fact use it only for the case where the task\nhas a mm pointer.\n\nBut we have one odd special case: ptrace_may_access() uses \u0027dumpable\u0027 to\ncheck various other things entirely independently of the MM (typically\nexplicitly using flags like PTRACE_MODE_READ_FSCREDS).  Including for\nthreads that no longer have a VM (and maybe never did, like most kernel\nthreads).\n\nIt\u0027s not what this flag was designed for, but it is what it is.\n\nThe ptrace code does check that the uid/gid matches, so you do have to\nbe uid-0 to see kernel thread details, but this means that the\ntraditional \"drop capabilities\" model doesn\u0027t make any difference for\nthis all.\n\nMake it all make a *bit* more sense by saying that if you don\u0027t have a\nMM pointer, we\u0027ll use a cached \"last dumpability\" flag if the thread\never had a MM (it will be zero for kernel threads since it is never\nset), and require a proper CAP_SYS_PTRACE capability to override."
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              "value": "AV:L - The vulnerable authorization check is reached through local interfaces such as ptrace-style checks, procfs, and pidfd_getfd; it is not reachable from network packets or adjacent/physical input.\nAC:L - A local attacker can repeatedly trigger the relevant check and, for exiting tasks, can race pidfd_getfd/procfs access against a target\u0027s exit path after exit_mm() but before exit_files(). The race is attacker-driven and does not require unusual kernel configuration or conditions outside the attacker\u0027s influence.\nPR:L - An unprivileged local user can target same-UID nondumpable tasks because the vulnerable code skips the dumpability requirement once task-\u003emm is NULL. User-namespace root does not help against init-namespace root kernel threads, but low local privileges are enough for the same-UID exiting-task case.\nUI:N - Exploitation does not require a victim user to open a file or perform an interactive action; the attacker can use local syscalls/procfs against an existing or attacker-terminated target task.\nS:U - The bug bypasses Linux kernel task-access authorization within the same OS security authority. It does not cross a VM, IOMMU, or hypervisor boundary.\nC:H - The bypass can allow access to sensitive task details and, most importantly, pidfd_getfd can duplicate file descriptors from a nondumpable task during the exit window. In a plausible helper/sandbox scenario, those descriptors can expose highly sensitive files or privileged resources.\nI:H - If the duplicated descriptor is writable, the attacker can modify the protected resource reachable through the victim\u0027s file descriptor despite the dumpability restriction. This is a high-impact integrity bypass even though the bug is not memory corruption.\nA:N - The issue is an access-control bypass around ptrace/dumpability checks and does not by itself provide a kernel crash, hang, deadlock, or sustained denial of service."
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        "dateUpdated": "2026-08-05T12:31:28.199Z",
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      "title": "ptrace: slightly saner \u0027get_dumpable()\u0027 logic",
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    "dateReserved": "2026-05-13T15:03:33.113Z",
    "dateUpdated": "2026-08-24T12:06:56.656Z",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: Fix use-after-free when processing MLD queries\n\nWhen processing an MLD query, a pointer to the multicast group address\nis retrieved when initially parsing the packet. This pointer is later\ndereferenced without being reloaded despite the fact that the skb header\nmight have been reallocated following the pskb_may_pull() calls, leading\nto a use-after-free [1].\n\nFix by copying the multicast group address when the packet is initially\nparsed.\n\n[1]\nBUG: KASAN: slab-use-after-free in __mld_query_work (net/ipv6/mcast.c:1512)\nRead of size 8 at addr ffff8881154b8e90 by task kworker/4:1/118\n\nWorkqueue: mld mld_query_work\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)\nprint_address_description.constprop.0 (mm/kasan/report.c:378)\nprint_report (mm/kasan/report.c:482)\nkasan_report (mm/kasan/report.c:595)\n__mld_query_work (net/ipv6/mcast.c:1512)\nmld_query_work (net/ipv6/mcast.c:1563)\nprocess_one_work (kernel/workqueue.c:3314)\nworker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)\nkthread (kernel/kthread.c:436)\nret_from_fork (arch/x86/kernel/process.c:158)\nret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n\u003c/TASK\u003e\n\n[...]\n\nFreed by task 118:\nkasan_save_stack (mm/kasan/common.c:57)\nkasan_save_track (mm/kasan/common.c:78)\nkasan_save_free_info (mm/kasan/generic.c:584)\n__kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285)\nkfree (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6251 mm/slub.c:6566)\npskb_expand_head (net/core/skbuff.c:2335)\n__pskb_pull_tail (net/core/skbuff.c:2878 (discriminator 4))\n__mld_query_work (net/ipv6/mcast.c:1495 (discriminator 1))\nmld_query_work (net/ipv6/mcast.c:1563)\nprocess_one_work (kernel/workqueue.c:3314)\nworker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)\nkthread (kernel/kthread.c:436)\nret_from_fork (arch/x86/kernel/process.c:158)\nret_from_fork_asm (arch/x86/entry/entry_64.S:245)"
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              "lang": "en",
              "value": "AV:A - The vulnerable MLD query handler is reached by received ICMPv6 MLD Query packets, but the code requires a link-local IPv6 source, Hop Limit 1, and the MLD Router Alert option, making the highest defensible reachability an adjacent same-link attacker.\nAC:L - The attacker controls the packet contents, MLDv2 source count, and packet layout needed to trigger the stale skb-header pointer after pskb_may_pull(); there is no victim-controlled race or authentication-dependent state.\nPR:N - No local privileges or authentication are required; any adjacent network peer able to send crafted IPv6 MLD queries to the host can reach igmp6_event_query() and the queued mld_query_work path.\nUI:N - Exploitation is triggered by packet reception and asynchronous kernel workqueue processing without any required victim user action.\nS:U - The bug is in the host kernel IPv6 multicast listener processing and impacts the same kernel security authority, with no VM, IOMMU, or separate-scope boundary crossed.\nC:H - This is a use-after-free in kernel networking code; under the required conservative kernel guidance, UAFs are treated as capable of enabling high-impact information disclosure.\nI:H - Although the immediate stale access is a freed-memory read used in address comparison, it is still a kernel UAF and must be scored conservatively as potentially exploitable for memory corruption/control-flow impact.\nA:H - The commit includes a KASAN-confirmed slab-use-after-free in __mld_query_work(), and kernel UAFs can cause oops/panic or repeated denial of service."
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    "dateReserved": "2026-06-09T07:44:35.395Z",
    "dateUpdated": "2026-08-05T12:34:51.568Z",
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              "value": "AV:L - The buggy path is exclusively `iso_sock_close()` calling `iso_sock_clear_timer()` without the socket lock, reachable only via local socket teardown (`close()`/`release()` on `BTPROTO_ISO`). The concurrent `iso_conn_del()` leg can be driven by adjacent Bluetooth HCI disconnect events, but adjacent access alone cannot reach the unlocked call site.\nAC:L - The attacker controls both sides of the race: a local thread can close the ISO socket while concurrently triggering or awaiting an HCI disconnect (locally initiated or from an adjacent Bluetooth peer), and can repeat the attempt until the window is hit.\nPR:L - Creating and closing `AF_BLUETOOTH`/`BTPROTO_ISO` sockets requires no kernel capabilities (`iso_sock_create()` has no `CAP_*` check); any unprivileged local process in the initial network namespace with Bluetooth access can reach the vulnerable code.\nUI:N - Exploitation does not require victim interaction when the attacker runs local code that opens an ISO socket and deliberately races `close()` against a Bluetooth disconnect; no pairing prompt or user action beyond attacker-controlled setup is needed.\nS:U - Impact is confined to kernel memory corruption and crash/privilege-escalation primitives within the same kernel security authority; there is no VM, sandbox, or IOMMU boundary crossing.\nC:H - The commit documents both NULL pointer dereference and use-after-free on `iso_conn`; UAF on a freed `iso_conn` structure gives attacker-influenced access to kernel heap memory and can be leveraged for information disclosure.\nI:H - Use-after-free on `iso_conn` via `cancel_delayed_work(\u0026conn-\u003etimeout_work)` on freed memory is heap corruption with a function-pointer-bearing work struct, enabling spray-based arbitrary write and potential control-flow hijacking.\nA:H - The race produces kernel NULL dereference or use-after-free in softirq/workqueue context, which can oops or panic the host; UAF in connection teardown is independently availability-impacting even before full exploitation."
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          "url": "https://git.kernel.org/stable/c/4b5f8e608749b7e8fa386c6e4301cf9272595859"
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      "title": "Bluetooth: ISO: serialize iso_sock_clear_timer with socket lock",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ip_gre: require CAP_NET_ADMIN in the device netns for changelink\n\nA tunnel changelink() operates on at most two netns, dev_net(dev) and\nthe tunnel link netns t-\u003enet. They differ once the device is created in\nor moved to a netns other than the one the request runs in. The rtnl\nchangelink path checks CAP_NET_ADMIN only against dev_net(dev), so a\ncaller privileged there but not in t-\u003enet can rewrite a tunnel that\nlives in t-\u003enet.\n\nAdd rtnl_dev_link_net_capable() next to rtnl_get_net_ns_capable() in\nnet/core/rtnetlink.c. It requires CAP_NET_ADMIN in the link netns and is\nskipped when the link netns is dev_net(dev), where the rtnl path already\nchecked it. The other patches in this series use the same helper.\n\nGate ipgre_changelink() and erspan_changelink() with it, at the top of\nthe op before any attribute is parsed, because the parsers update live\ntunnel fields first. ipgre_netlink_parms() sets t-\u003ecollect_md before\nip_tunnel_changelink() runs.\n\nCommit 8b484efd5cb4 (\"ip6: vti: Use ip6_tnl.net in\nvti6_siocdevprivate().\") added the same check on the ioctl path. This\nadds it on RTM_NEWLINK."
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              "value": "AV:L - Exploitation requires sending RTM_NEWLINK changelink requests over rtnetlink (netlink socket), matching the kernel guidance that tc/netlink configuration paths are Local.\nAC:L - Once a cross-namespace GRE/ERSPAN device is present in the caller\u0027s netns, triggering the bug is a single deterministic netlink changelink with no races or attacker-uncontrollable timing.\nPR:L - The rtnl entry path requires CAP_NET_ADMIN in dev_net(dev), which an unprivileged user can obtain inside a user namespace via unshare --user --map-root-user --net without real init-namespace root.\nUI:N - Exploitation is fully programmatic through netlink; no victim user action such as opening a file or mounting a filesystem is required.\nS:C - The changelink mutates tunnel state in t-\u003enet while authorization is checked only against dev_net(dev), crossing from the attacker\u0027s net/user namespace into another tenant\u0027s or the host\u0027s network namespace tunnel tables.\nC:H - An attacker can rewrite IFLA_GRE_REMOTE/LOCAL, keys, and related tunnel parameters to redirect GRE/ERSPAN traffic through attacker-controlled endpoints and read tunneled payloads.\nI:H - Unauthorized changelink updates live tunnel fields (including collect_md and encap parameters parsed before the missing check), enabling arbitrary redirection or injection of traffic in the victim link netns.\nA:H - Rewriting tunnel endpoints, keys, or metadata handling can break production GRE/ERSPAN overlays and VPN paths, causing sustained loss of connectivity for dependent services."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/psi: fix race between file release and pressure write\n\nA potential race condition exists between pressure write and cgroup file\nrelease regarding the priv member of struct kernfs_open_file, which\ntriggers the uaf reported in [1].\n\nConsider the following scenario involving execution on two separate CPUs:\n\n   CPU0\t\t\t\t\tCPU1\n   ====\t\t\t\t\t====\n\t\t\t\t\tvfs_rmdir()\n\t\t\t\t\tkernfs_iop_rmdir()\n\t\t\t\t\tcgroup_rmdir()\n\t\t\t\t\tcgroup_kn_lock_live()\n\t\t\t\t\tcgroup_destroy_locked()\n\t\t\t\t\tcgroup_addrm_files()\n\t\t\t\t\tcgroup_rm_file()\n\t\t\t\t\tkernfs_remove_by_name()\n\t\t\t\t\tkernfs_remove_by_name_ns()\n vfs_write()\t\t\t\t__kernfs_remove()\n new_sync_write()\t\t\tkernfs_drain()\n kernfs_fop_write_iter()\t\tkernfs_drain_open_files()\n cgroup_file_write()\t\t\tkernfs_release_file()\n pressure_write()\t\t\tcgroup_file_release()\n ctx = of-\u003epriv;\n\t\t\t\t\tkfree(ctx);\n \t\t\t\t\tof-\u003epriv = NULL;\n\t\t\t\t\tcgroup_kn_unlock()\n cgroup_kn_lock_live()\n cgroup_get(cgrp)\n cgroup_kn_unlock()\n if (ctx-\u003epsi.trigger)  // here, trigger uaf for ctx, that is of-\u003epriv\n\nThe cgroup_rmdir() is protected by the cgroup_mutex, it also safeguards\nthe memory deallocation of of-\u003epriv performed within cgroup_file_release().\nHowever, the operations involving of-\u003epriv executed within pressure_write()\nare not entirely covered by the protection of cgroup_mutex. Consequently,\nif the code in pressure_write(), specifically the section handling the\nctx variable executes after cgroup_file_release() has completed, a uaf\nvulnerability involving of-\u003epriv is triggered.\n\nTherefore, the issue can be resolved by extending the scope of the\ncgroup_mutex lock within pressure_write() to encompass all code paths\ninvolving of-\u003epriv, thereby properly synchronizing the race condition\noccurring between cgroup_file_release() and pressure_write().\n\nAnd, if an live kn lock can be successfully acquired while executing\nthe pressure write operation, it indicates that the cgroup deletion\nprocess has not yet reached its final stage; consequently, the priv\npointer within open_file cannot be NULL. Therefore, the operation to\nretrieve the ctx value must be moved to a point *after* the live kn\nlock has been successfully acquired.\n\nIn another situation, specifically after entering cgroup_kn_lock_live()\nbut before acquiring cgroup_mutex, there exists a different class of\nrace condition:\n\nCPU0: write memory.pressure               CPU1: write cgroup.pressure=0\n===========================\t\t  =============================\n\nkernfs_fop_write_iter()\n kernfs_get_active_of(of)\n pressure_write()\n   cgroup_kn_lock_live(memory.pressure)\n     cgroup_tryget(cgrp)\n     kernfs_break_active_protection(kn)\n     ... blocks on cgroup_mutex\n\n                                     \t  cgroup_pressure_write()\n                                     \t  cgroup_kn_lock_live(cgroup.pressure)\n                                     \t  cgroup_file_show(memory.pressure, false)\n                                     \t    kernfs_show(false)\n                                     \t      kernfs_drain_open_files()\n                                     \t        cgroup_file_release(of)\n                                     \t          kfree(ctx)\n                                     \t            of-\u003epriv = NULL\n                                     \t  cgroup_kn_unlock()\n\n   ... acquires cgroup_mutex\n   ctx = of-\u003epriv;        // may now be NULL\n   if (ctx-\u003epsi.trigger)  // NULL dereference\n\nConsequently, there is a possibility that of-\u003epriv is NULL, the pressure\nwrite needs to check for this.\n\nNow that the scope of the cgroup_mutex has been expanded, the original\nexplicit cgroup_get/put operations are no longer necessary, this is\nbecause acquiring/releasing the live kn lock inherently executes a\ncgroup get/put operation.\n\n[1]\nBUG: KASAN: slab-use-after-free in pressure_write+0xa4/0x210 kernel/cgroup/cgroup.c:4011\nCall Trace:\n pressure_write+0xa4/0x210 kernel/cgroup/cgroup.c:4011\n cgroup_file_write+0x36f/0x790 kernel/cgroup/cgroup.c:43\n---truncated---"
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "value": "AV:L - The vulnerable path is reached through local syscalls writing to cgroup v2 PSI control files such as cpu.pressure, memory.pressure, io.pressure, or irq.pressure. There is no network or physical packet-processing path involved.\nAC:L - The attacker can control both sides of the race by concurrently writing a pressure trigger and removing the cgroup or disabling cgroup.pressure to drain open files. No unusual victim state or externally uncontrolled timing condition is required beyond a repeatable local race.\nPR:L - The pressure files are local cgroupfs files; root can always reach them, and unprivileged users can reach equivalent files in delegated cgroup sub-hierarchies they can create and manage. This is therefore low local privilege rather than init-namespace administrator-only.\nUI:N - Exploitation only requires attacker-controlled syscalls against cgroupfs file descriptors. No victim user action is needed.\nS:U - The vulnerability corrupts kernel memory from a kernel cgroup/PSI file operation and impacts the same kernel security authority. It is not a VM escape, IOMMU bypass, or cross-authority boundary violation.\nC:H - This is a slab use-after-free of struct cgroup_file_ctx, and the stale object can be raced with attacker-influenced heap reuse. Following kernel UAF scoring guidance, this can plausibly support kernel memory disclosure primitives.\nI:H - The pre-fix path can read and later store through the freed ctx-\u003epsi.trigger field after the object has been freed, giving a plausible write/corruption primitive with heap grooming. Following kernel UAF scoring guidance, integrity impact is high.\nA:H - The reported bug is a KASAN slab-use-after-free in pressure_write and can crash or oops the kernel. Repeated local triggering can therefore cause high availability impact."
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