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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix use-after-free in btrfs_encoded_read_endio()\n\nShinichiro reported the following use-after free that sometimes is\nhappening in our CI system when running fstests\u0027 btrfs/284 on a TCMU\nrunner device:\n\n  BUG: KASAN: slab-use-after-free in lock_release+0x708/0x780\n  Read of size 8 at addr ffff888106a83f18 by task kworker/u80:6/219\n\n  CPU: 8 UID: 0 PID: 219 Comm: kworker/u80:6 Not tainted 6.12.0-rc6-kts+ #15\n  Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 3.3 02/21/2020\n  Workqueue: btrfs-endio btrfs_end_bio_work [btrfs]\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x6e/0xa0\n   ? lock_release+0x708/0x780\n   print_report+0x174/0x505\n   ? lock_release+0x708/0x780\n   ? __virt_addr_valid+0x224/0x410\n   ? lock_release+0x708/0x780\n   kasan_report+0xda/0x1b0\n   ? lock_release+0x708/0x780\n   ? __wake_up+0x44/0x60\n   lock_release+0x708/0x780\n   ? __pfx_lock_release+0x10/0x10\n   ? __pfx_do_raw_spin_lock+0x10/0x10\n   ? lock_is_held_type+0x9a/0x110\n   _raw_spin_unlock_irqrestore+0x1f/0x60\n   __wake_up+0x44/0x60\n   btrfs_encoded_read_endio+0x14b/0x190 [btrfs]\n   btrfs_check_read_bio+0x8d9/0x1360 [btrfs]\n   ? lock_release+0x1b0/0x780\n   ? trace_lock_acquire+0x12f/0x1a0\n   ? __pfx_btrfs_check_read_bio+0x10/0x10 [btrfs]\n   ? process_one_work+0x7e3/0x1460\n   ? lock_acquire+0x31/0xc0\n   ? process_one_work+0x7e3/0x1460\n   process_one_work+0x85c/0x1460\n   ? __pfx_process_one_work+0x10/0x10\n   ? assign_work+0x16c/0x240\n   worker_thread+0x5e6/0xfc0\n   ? __pfx_worker_thread+0x10/0x10\n   kthread+0x2c3/0x3a0\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork+0x31/0x70\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork_asm+0x1a/0x30\n   \u003c/TASK\u003e\n\n  Allocated by task 3661:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   __kasan_kmalloc+0xaa/0xb0\n   btrfs_encoded_read_regular_fill_pages+0x16c/0x6d0 [btrfs]\n   send_extent_data+0xf0f/0x24a0 [btrfs]\n   process_extent+0x48a/0x1830 [btrfs]\n   changed_cb+0x178b/0x2ea0 [btrfs]\n   btrfs_ioctl_send+0x3bf9/0x5c20 [btrfs]\n   _btrfs_ioctl_send+0x117/0x330 [btrfs]\n   btrfs_ioctl+0x184a/0x60a0 [btrfs]\n   __x64_sys_ioctl+0x12e/0x1a0\n   do_syscall_64+0x95/0x180\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n  Freed by task 3661:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   kasan_save_free_info+0x3b/0x70\n   __kasan_slab_free+0x4f/0x70\n   kfree+0x143/0x490\n   btrfs_encoded_read_regular_fill_pages+0x531/0x6d0 [btrfs]\n   send_extent_data+0xf0f/0x24a0 [btrfs]\n   process_extent+0x48a/0x1830 [btrfs]\n   changed_cb+0x178b/0x2ea0 [btrfs]\n   btrfs_ioctl_send+0x3bf9/0x5c20 [btrfs]\n   _btrfs_ioctl_send+0x117/0x330 [btrfs]\n   btrfs_ioctl+0x184a/0x60a0 [btrfs]\n   __x64_sys_ioctl+0x12e/0x1a0\n   do_syscall_64+0x95/0x180\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n  The buggy address belongs to the object at ffff888106a83f00\n   which belongs to the cache kmalloc-rnd-07-96 of size 96\n  The buggy address is located 24 bytes inside of\n   freed 96-byte region [ffff888106a83f00, ffff888106a83f60)\n\n  The buggy address belongs to the physical page:\n  page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888106a83800 pfn:0x106a83\n  flags: 0x17ffffc0000000(node=0|zone=2|lastcpupid=0x1fffff)\n  page_type: f5(slab)\n  raw: 0017ffffc0000000 ffff888100053680 ffffea0004917200 0000000000000004\n  raw: ffff888106a83800 0000000080200019 00000001f5000000 0000000000000000\n  page dumped because: kasan: bad access detected\n\n  Memory state around the buggy address:\n   ffff888106a83e00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n   ffff888106a83e80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n  \u003effff888106a83f00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n                              ^\n   ffff888106a83f80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n   ffff888106a84000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n  ==================================================================\n\nFurther analyzing the trace and \n---truncated---"
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              "value": "AV:L - The vulnerable path is entered through AML evaluation of a PlatformRtMechanism OperationRegion write, driven by local ACPI method evaluation (sysfs attribute access, device methods) or the in-kernel AMD RAS address-translation path. There is no remote or adjacent-network reachability.\nAC:L - On an affected platform the mistranslation is computed once at boot in acpi_parse_prmt() and is deterministic \u2014 every subsequent PRM handler invocation uses the bad pointers, with no race to win and no memory-layout luck required. CONFIG_ACPI_PRMT is default y on all X86_64/ARM64 EFI kernels.\nPR:L - An unprivileged local account suffices: ordinary world-readable sysfs attributes (thermal zone temperature, battery state, device _DSM-backed nodes) cause the ACPI interpreter to execute AML that can issue the PlatformRtMechanism write. No CAP_* capability or root is checked anywhere on the path from AML to acpi_platformrt_space_handler().\nUI:N - The attacker triggers ACPI method evaluation entirely through their own actions; no victim must open a file, mount a filesystem, or take any other step.\nS:U - The miscomputed pointers are used by the kernel and by firmware acting on the kernel\u0027s behalf, and the resulting corruption and denial of service remain within the kernel/platform security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The mistranslated static_data_buffer_addr and acpi_param_buffer_addr are passed unchecked to the firmware PRM handler, which reads through them; because efi_pgd contains 1:1 mappings of every runtime region plus page 0 and the ident-mapped memmap, these unbounded out-of-range reads can pull arbitrary kernel and firmware memory into the PRM context, an unbounded disclosure primitive.\nI:H - The same wrong pointers give the firmware handler an out-of-bounds write into mapped, writable memory in efi_mm, and the mistranslated handler_addr is used directly as an indirect call target \u2014 with EFI_RUNTIME_SERVICES_CODE regions mapped 1:1 and executable, this is a control-flow transfer to unintended code executing at the highest privilege level.\nA:H - When the bogus address is unmapped the call faults inside EFI runtime services; x86_64\u0027s efi_crash_gracefully_on_page_fault() WARNs, clears EFI_RUNTIME_SERVICES and parks the efi_rts_wq worker in an infinite schedule() loop, permanently destroying EFI runtime services (efivarfs, capsule update, EFI reboot) and leaking a kernel worker, with a panic on panic_on_warn systems."
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Fix the KASAN report slab-out-of-bounds bug\n\nAttaching SST PCI device to VM causes \"BUG: KASAN: slab-out-of-bounds\".\nkasan report:\n[   19.411889] ==================================================================\n[   19.413702] BUG: KASAN: slab-out-of-bounds in _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common]\n[   19.415634] Read of size 8 at addr ffff888829e65200 by task cpuhp/16/113\n[   19.417368]\n[   19.418627] CPU: 16 PID: 113 Comm: cpuhp/16 Tainted: G            E      6.9.0 #10\n[   19.420435] Hardware name: VMware, Inc. VMware20,1/440BX Desktop Reference Platform, BIOS VMW201.00V.20192059.B64.2207280713 07/28/2022\n[   19.422687] Call Trace:\n[   19.424091]  \u003cTASK\u003e\n[   19.425448]  dump_stack_lvl+0x5d/0x80\n[   19.426963]  ? _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common]\n[   19.428694]  print_report+0x19d/0x52e\n[   19.430206]  ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[   19.431837]  ? _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common]\n[   19.433539]  kasan_report+0xf0/0x170\n[   19.435019]  ? _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common]\n[   19.436709]  _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common]\n[   19.438379]  ? __pfx_sched_clock_cpu+0x10/0x10\n[   19.439910]  isst_if_cpu_online+0x406/0x58f [isst_if_common]\n[   19.441573]  ? __pfx_isst_if_cpu_online+0x10/0x10 [isst_if_common]\n[   19.443263]  ? ttwu_queue_wakelist+0x2c1/0x360\n[   19.444797]  cpuhp_invoke_callback+0x221/0xec0\n[   19.446337]  cpuhp_thread_fun+0x21b/0x610\n[   19.447814]  ? __pfx_cpuhp_thread_fun+0x10/0x10\n[   19.449354]  smpboot_thread_fn+0x2e7/0x6e0\n[   19.450859]  ? __pfx_smpboot_thread_fn+0x10/0x10\n[   19.452405]  kthread+0x29c/0x350\n[   19.453817]  ? __pfx_kthread+0x10/0x10\n[   19.455253]  ret_from_fork+0x31/0x70\n[   19.456685]  ? __pfx_kthread+0x10/0x10\n[   19.458114]  ret_from_fork_asm+0x1a/0x30\n[   19.459573]  \u003c/TASK\u003e\n[   19.460853]\n[   19.462055] Allocated by task 1198:\n[   19.463410]  kasan_save_stack+0x30/0x50\n[   19.464788]  kasan_save_track+0x14/0x30\n[   19.466139]  __kasan_kmalloc+0xaa/0xb0\n[   19.467465]  __kmalloc+0x1cd/0x470\n[   19.468748]  isst_if_cdev_register+0x1da/0x350 [isst_if_common]\n[   19.470233]  isst_if_mbox_init+0x108/0xff0 [isst_if_mbox_msr]\n[   19.471670]  do_one_initcall+0xa4/0x380\n[   19.472903]  do_init_module+0x238/0x760\n[   19.474105]  load_module+0x5239/0x6f00\n[   19.475285]  init_module_from_file+0xd1/0x130\n[   19.476506]  idempotent_init_module+0x23b/0x650\n[   19.477725]  __x64_sys_finit_module+0xbe/0x130\n[   19.476506]  idempotent_init_module+0x23b/0x650\n[   19.477725]  __x64_sys_finit_module+0xbe/0x130\n[   19.478920]  do_syscall_64+0x82/0x160\n[   19.480036]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   19.481292]\n[   19.482205] The buggy address belongs to the object at ffff888829e65000\n which belongs to the cache kmalloc-512 of size 512\n[   19.484818] The buggy address is located 0 bytes to the right of\n allocated 512-byte region [ffff888829e65000, ffff888829e65200)\n[   19.487447]\n[   19.488328] The buggy address belongs to the physical page:\n[   19.489569] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888829e60c00 pfn:0x829e60\n[   19.491140] head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n[   19.492466] anon flags: 0x57ffffc0000840(slab|head|node=1|zone=2|lastcpupid=0x1fffff)\n[   19.493914] page_type: 0xffffffff()\n[   19.494988] raw: 0057ffffc0000840 ffff88810004cc80 0000000000000000 0000000000000001\n[   19.496451] raw: ffff888829e60c00 0000000080200018 00000001ffffffff 0000000000000000\n[   19.497906] head: 0057ffffc0000840 ffff88810004cc80 0000000000000000 0000000000000001\n[   19.499379] head: ffff888829e60c00 0000000080200018 00000001ffffffff 0000000000000000\n[   19.500844] head: 0057ffffc0000003 ffffea0020a79801 ffffea0020a79848 00000000ffffffff\n[   19.502316] head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000\n[   19.503784] page dumped because: k\n---truncated---"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin()\n\nUse {READ,WRITE}_ONCE() to access kvm-\u003elast_boosted_vcpu to ensure the\nloads and stores are atomic.  In the extremely unlikely scenario the\ncompiler tears the stores, it\u0027s theoretically possible for KVM to attempt\nto get a vCPU using an out-of-bounds index, e.g. if the write is split\ninto multiple 8-bit stores, and is paired with a 32-bit load on a VM with\n257 vCPUs:\n\n  CPU0                              CPU1\n  last_boosted_vcpu = 0xff;\n\n                                    (last_boosted_vcpu = 0x100)\n                                    last_boosted_vcpu[15:8] = 0x01;\n  i = (last_boosted_vcpu = 0x1ff)\n                                    last_boosted_vcpu[7:0] = 0x00;\n\n  vcpu = kvm-\u003evcpu_array[0x1ff];\n\nAs detected by KCSAN:\n\n  BUG: KCSAN: data-race in kvm_vcpu_on_spin [kvm] / kvm_vcpu_on_spin [kvm]\n\n  write to 0xffffc90025a92344 of 4 bytes by task 4340 on cpu 16:\n  kvm_vcpu_on_spin (arch/x86/kvm/../../../virt/kvm/kvm_main.c:4112) kvm\n  handle_pause (arch/x86/kvm/vmx/vmx.c:5929) kvm_intel\n  vmx_handle_exit (arch/x86/kvm/vmx/vmx.c:?\n\t\t arch/x86/kvm/vmx/vmx.c:6606) kvm_intel\n  vcpu_run (arch/x86/kvm/x86.c:11107 arch/x86/kvm/x86.c:11211) kvm\n  kvm_arch_vcpu_ioctl_run (arch/x86/kvm/x86.c:?) kvm\n  kvm_vcpu_ioctl (arch/x86/kvm/../../../virt/kvm/kvm_main.c:?) kvm\n  __se_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:904 fs/ioctl.c:890)\n  __x64_sys_ioctl (fs/ioctl.c:890)\n  x64_sys_call (arch/x86/entry/syscall_64.c:33)\n  do_syscall_64 (arch/x86/entry/common.c:?)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\n  read to 0xffffc90025a92344 of 4 bytes by task 4342 on cpu 4:\n  kvm_vcpu_on_spin (arch/x86/kvm/../../../virt/kvm/kvm_main.c:4069) kvm\n  handle_pause (arch/x86/kvm/vmx/vmx.c:5929) kvm_intel\n  vmx_handle_exit (arch/x86/kvm/vmx/vmx.c:?\n\t\t\tarch/x86/kvm/vmx/vmx.c:6606) kvm_intel\n  vcpu_run (arch/x86/kvm/x86.c:11107 arch/x86/kvm/x86.c:11211) kvm\n  kvm_arch_vcpu_ioctl_run (arch/x86/kvm/x86.c:?) kvm\n  kvm_vcpu_ioctl (arch/x86/kvm/../../../virt/kvm/kvm_main.c:?) kvm\n  __se_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:904 fs/ioctl.c:890)\n  __x64_sys_ioctl (fs/ioctl.c:890)\n  x64_sys_call (arch/x86/entry/syscall_64.c:33)\n  do_syscall_64 (arch/x86/entry/common.c:?)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\n  value changed: 0x00000012 -\u003e 0x00000000"
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              "value": "AV:L - The vulnerable code is entered only from guest execution of PAUSE/WFE/DIAG-0x44 handled by the host KVM module, or equivalently via the `KVM_RUN` ioctl on `/dev/kvm` as shown in the KCSAN stack trace. There is no network-facing path to `kvm_vcpu_on_spin()`, so the attacker must be running code locally on the host or inside a VM hosted on it.\nAC:L - The attacker controls both sides of the race outright \u2014 a guest simply runs PAUSE spin loops on several vCPUs at once, driving many threads into the unsynchronized read/write of `kvm-\u003elast_boosted_vcpu` with no external precondition. No specific victim state or memory layout the attacker cannot influence is required to hit the racing accesses.\nPR:L - The attacker needs the ability to run code inside a VM on the host (or open `/dev/kvm` locally), which is an unprivileged-user-level capability \u2014 no root or CAP_SYS_ADMIN is required, and PAUSE is executable from guest ring 3. This matches the standard treatment of guest-triggerable KVM host bugs.\nUI:N - Triggering requires only that the attacker\u0027s own guest vCPU threads spin concurrently; no host administrator or other user has to perform any action. The race is hit entirely by the attacker\u0027s own execution.\nS:C - The bug is triggered by unprivileged code inside a guest but the corrupted index and any resulting wild pointer access occur in the host kernel, crossing the VM-to-hypervisor security boundary. A guest compromising host kernel availability/integrity is a scope change.\nC:L - A torn value yields an out-of-bounds vCPU index, causing the host to read a pointer-sized slot past the vCPU array and then dereference it (`vcpu-\u003eready`, `vcpu-\u003epreempted`, `target-\u003epid`), touching host kernel memory outside the intended object. The read value is never returned to the guest and the offset is not attacker-chosen, so this is a limited disclosure rather than an arbitrary read primitive.\nI:L - `kvm_vcpu_eligible_for_directed_yield()` writes `vcpu-\u003espin_loop.dy_eligible` through the same unvalidated pointer, giving a fixed-offset host-kernel write via an out-of-bounds vCPU reference, and the bogus target also perturbs host scheduling through `yield_to()`. The written value and target address are not attacker-controlled, limiting this to bounded corruption rather than a control-flow hijack primitive.\nA:H - Per the upstream changelog, the torn access lets KVM fetch a vCPU with an out-of-bounds index; the resulting NULL or garbage pointer is dereferenced without any validation, oopsing or panicking the host kernel. A guest crashing the hypervisor takes down the host and every other VM on it."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix data-races around sk-\u003esk_forward_alloc\n\nSyzkaller reported this warning:\n ------------[ cut here ]------------\n WARNING: CPU: 0 PID: 16 at net/ipv4/af_inet.c:156 inet_sock_destruct+0x1c5/0x1e0\n Modules linked in:\n CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.12.0-rc5 #26\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\n RIP: 0010:inet_sock_destruct+0x1c5/0x1e0\n Code: 24 12 4c 89 e2 5b 48 c7 c7 98 ec bb 82 41 5c e9 d1 18 17 ff 4c 89 e6 5b 48 c7 c7 d0 ec bb 82 41 5c e9 bf 18 17 ff 0f 0b eb 83 \u003c0f\u003e 0b eb 97 0f 0b eb 87 0f 0b e9 68 ff ff ff 66 66 2e 0f 1f 84 00\n RSP: 0018:ffffc9000008bd90 EFLAGS: 00010206\n RAX: 0000000000000300 RBX: ffff88810b172a90 RCX: 0000000000000007\n RDX: 0000000000000002 RSI: 0000000000000300 RDI: ffff88810b172a00\n RBP: ffff88810b172a00 R08: ffff888104273c00 R09: 0000000000100007\n R10: 0000000000020000 R11: 0000000000000006 R12: ffff88810b172a00\n R13: 0000000000000004 R14: 0000000000000000 R15: ffff888237c31f78\n FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007ffc63fecac8 CR3: 000000000342e000 CR4: 00000000000006f0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n  \u003cTASK\u003e\n  ? __warn+0x88/0x130\n  ? inet_sock_destruct+0x1c5/0x1e0\n  ? report_bug+0x18e/0x1a0\n  ? handle_bug+0x53/0x90\n  ? exc_invalid_op+0x18/0x70\n  ? asm_exc_invalid_op+0x1a/0x20\n  ? inet_sock_destruct+0x1c5/0x1e0\n  __sk_destruct+0x2a/0x200\n  rcu_do_batch+0x1aa/0x530\n  ? rcu_do_batch+0x13b/0x530\n  rcu_core+0x159/0x2f0\n  handle_softirqs+0xd3/0x2b0\n  ? __pfx_smpboot_thread_fn+0x10/0x10\n  run_ksoftirqd+0x25/0x30\n  smpboot_thread_fn+0xdd/0x1d0\n  kthread+0xd3/0x100\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork+0x34/0x50\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork_asm+0x1a/0x30\n  \u003c/TASK\u003e\n ---[ end trace 0000000000000000 ]---\n\nIts possible that two threads call tcp_v6_do_rcv()/sk_forward_alloc_add()\nconcurrently when sk-\u003esk_state == TCP_LISTEN with sk-\u003esk_lock unlocked,\nwhich triggers a data-race around sk-\u003esk_forward_alloc:\ntcp_v6_rcv\n    tcp_v6_do_rcv\n        skb_clone_and_charge_r\n            sk_rmem_schedule\n                __sk_mem_schedule\n                    sk_forward_alloc_add()\n            skb_set_owner_r\n                sk_mem_charge\n                    sk_forward_alloc_add()\n        __kfree_skb\n            skb_release_all\n                skb_release_head_state\n                    sock_rfree\n                        sk_mem_uncharge\n                            sk_forward_alloc_add()\n                            sk_mem_reclaim\n                                // set local var reclaimable\n                                __sk_mem_reclaim\n                                    sk_forward_alloc_add()\n\nIn this syzkaller testcase, two threads call\ntcp_v6_do_rcv() with skb-\u003etruesize=768, the sk_forward_alloc changes like\nthis:\n (cpu 1)             | (cpu 2)             | sk_forward_alloc\n ...                 | ...                 | 0\n __sk_mem_schedule() |                     | +4096 = 4096\n                     | __sk_mem_schedule() | +4096 = 8192\n sk_mem_charge()     |                     | -768  = 7424\n                     | sk_mem_charge()     | -768  = 6656\n ...                 |    ...              |\n sk_mem_uncharge()   |                     | +768  = 7424\n reclaimable=7424    |                     |\n                     | sk_mem_uncharge()   | +768  = 8192\n                     | reclaimable=8192    |\n __sk_mem_reclaim()  |                     | -4096 = 4096\n                     | __sk_mem_reclaim()  | -8192 = -4096 != 0\n\nThe skb_clone_and_charge_r() should not be called in tcp_v6_do_rcv() when\nsk-\u003esk_state is TCP_LISTEN, it happens later in tcp_v6_syn_recv_sock().\nFix the same issue in dccp_v6_do_rcv()."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: i2c: ar0521: Use cansleep version of gpiod_set_value()\n\nIf we use GPIO reset from I2C port expander, we must use *_cansleep()\nvariant of GPIO functions.\nThis was not done in ar0521_power_on()/ar0521_power_off() functions.\nLet\u0027s fix that.\n\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 11 at drivers/gpio/gpiolib.c:3496 gpiod_set_value+0x74/0x7c\nModules linked in:\nCPU: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0 #53\nHardware name: Diasom DS-RK3568-SOM-EVB (DT)\nWorkqueue: events_unbound deferred_probe_work_func\npstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : gpiod_set_value+0x74/0x7c\nlr : ar0521_power_on+0xcc/0x290\nsp : ffffff8001d7ab70\nx29: ffffff8001d7ab70 x28: ffffff80027dcc90 x27: ffffff8003c82000\nx26: ffffff8003ca9250 x25: ffffffc080a39c60 x24: ffffff8003ca9088\nx23: ffffff8002402720 x22: ffffff8003ca9080 x21: ffffff8003ca9088\nx20: 0000000000000000 x19: ffffff8001eb2a00 x18: ffffff80efeeac80\nx17: 756d2d6332692f30 x16: 0000000000000000 x15: 0000000000000000\nx14: ffffff8001d91d40 x13: 0000000000000016 x12: ffffffc080e98930\nx11: ffffff8001eb2880 x10: 0000000000000890 x9 : ffffff8001d7a9f0\nx8 : ffffff8001d92570 x7 : ffffff80efeeac80 x6 : 000000003fc6e780\nx5 : ffffff8001d91c80 x4 : 0000000000000002 x3 : 0000000000000000\nx2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000001\nCall trace:\n gpiod_set_value+0x74/0x7c\n ar0521_power_on+0xcc/0x290\n..."
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: devmap: provide rxq after redirect\n\nrxq contains a pointer to the device from where\nthe redirect happened. Currently, the BPF program\nthat was executed after a redirect via BPF_MAP_TYPE_DEVMAP*\ndoes not have it set.\n\nThis is particularly bad since accessing ingress_ifindex, e.g.\n\nSEC(\"xdp\")\nint prog(struct xdp_md *pkt)\n{\n        return bpf_redirect_map(\u0026dev_redirect_map, 0, 0);\n}\n\nSEC(\"xdp/devmap\")\nint prog_after_redirect(struct xdp_md *pkt)\n{\n        bpf_printk(\"ifindex %i\", pkt-\u003eingress_ifindex);\n        return XDP_PASS;\n}\n\ndepends on access to rxq, so a NULL pointer gets dereferenced:\n\n\u003c1\u003e[  574.475170] BUG: kernel NULL pointer dereference, address: 0000000000000000\n\u003c1\u003e[  574.475188] #PF: supervisor read access in kernel mode\n\u003c1\u003e[  574.475194] #PF: error_code(0x0000) - not-present page\n\u003c6\u003e[  574.475199] PGD 0 P4D 0\n\u003c4\u003e[  574.475207] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI\n\u003c4\u003e[  574.475217] CPU: 4 UID: 0 PID: 217 Comm: kworker/4:1 Not tainted 6.11.0-rc5-reduced-00859-g780801200300 #23\n\u003c4\u003e[  574.475226] Hardware name: Intel(R) Client Systems NUC13ANHi7/NUC13ANBi7, BIOS ANRPL357.0026.2023.0314.1458 03/14/2023\n\u003c4\u003e[  574.475231] Workqueue: mld mld_ifc_work\n\u003c4\u003e[  574.475247] RIP: 0010:bpf_prog_5e13354d9cf5018a_prog_after_redirect+0x17/0x3c\n\u003c4\u003e[  574.475257] Code: cc cc cc cc cc cc cc 80 00 00 00 cc cc cc cc cc cc cc cc f3 0f 1e fa 0f 1f 44 00 00 66 90 55 48 89 e5 f3 0f 1e fa 48 8b 57 20 \u003c48\u003e 8b 52 00 8b 92 e0 00 00 00 48 bf f8 a6 d5 c4 5d a0 ff ff be 0b\n\u003c4\u003e[  574.475263] RSP: 0018:ffffa62440280c98 EFLAGS: 00010206\n\u003c4\u003e[  574.475269] RAX: ffffa62440280cd8 RBX: 0000000000000001 RCX: 0000000000000000\n\u003c4\u003e[  574.475274] RDX: 0000000000000000 RSI: ffffa62440549048 RDI: ffffa62440280ce0\n\u003c4\u003e[  574.475278] RBP: ffffa62440280c98 R08: 0000000000000002 R09: 0000000000000001\n\u003c4\u003e[  574.475281] R10: ffffa05dc8b98000 R11: ffffa05f577fca40 R12: ffffa05dcab24000\n\u003c4\u003e[  574.475285] R13: ffffa62440280ce0 R14: ffffa62440549048 R15: ffffa62440549000\n\u003c4\u003e[  574.475289] FS:  0000000000000000(0000) GS:ffffa05f4f700000(0000) knlGS:0000000000000000\n\u003c4\u003e[  574.475294] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n\u003c4\u003e[  574.475298] CR2: 0000000000000000 CR3: 000000025522e000 CR4: 0000000000f50ef0\n\u003c4\u003e[  574.475303] PKRU: 55555554\n\u003c4\u003e[  574.475306] Call Trace:\n\u003c4\u003e[  574.475313]  \u003cIRQ\u003e\n\u003c4\u003e[  574.475318]  ? __die+0x23/0x70\n\u003c4\u003e[  574.475329]  ? page_fault_oops+0x180/0x4c0\n\u003c4\u003e[  574.475339]  ? skb_pp_cow_data+0x34c/0x490\n\u003c4\u003e[  574.475346]  ? kmem_cache_free+0x257/0x280\n\u003c4\u003e[  574.475357]  ? exc_page_fault+0x67/0x150\n\u003c4\u003e[  574.475368]  ? asm_exc_page_fault+0x26/0x30\n\u003c4\u003e[  574.475381]  ? bpf_prog_5e13354d9cf5018a_prog_after_redirect+0x17/0x3c\n\u003c4\u003e[  574.475386]  bq_xmit_all+0x158/0x420\n\u003c4\u003e[  574.475397]  __dev_flush+0x30/0x90\n\u003c4\u003e[  574.475407]  veth_poll+0x216/0x250 [veth]\n\u003c4\u003e[  574.475421]  __napi_poll+0x28/0x1c0\n\u003c4\u003e[  574.475430]  net_rx_action+0x32d/0x3a0\n\u003c4\u003e[  574.475441]  handle_softirqs+0xcb/0x2c0\n\u003c4\u003e[  574.475451]  do_softirq+0x40/0x60\n\u003c4\u003e[  574.475458]  \u003c/IRQ\u003e\n\u003c4\u003e[  574.475461]  \u003cTASK\u003e\n\u003c4\u003e[  574.475464]  __local_bh_enable_ip+0x66/0x70\n\u003c4\u003e[  574.475471]  __dev_queue_xmit+0x268/0xe40\n\u003c4\u003e[  574.475480]  ? selinux_ip_postroute+0x213/0x420\n\u003c4\u003e[  574.475491]  ? alloc_skb_with_frags+0x4a/0x1d0\n\u003c4\u003e[  574.475502]  ip6_finish_output2+0x2be/0x640\n\u003c4\u003e[  574.475512]  ? nf_hook_slow+0x42/0xf0\n\u003c4\u003e[  574.475521]  ip6_finish_output+0x194/0x300\n\u003c4\u003e[  574.475529]  ? __pfx_ip6_finish_output+0x10/0x10\n\u003c4\u003e[  574.475538]  mld_sendpack+0x17c/0x240\n\u003c4\u003e[  574.475548]  mld_ifc_work+0x192/0x410\n\u003c4\u003e[  574.475557]  process_one_work+0x15d/0x380\n\u003c4\u003e[  574.475566]  worker_thread+0x29d/0x3a0\n\u003c4\u003e[  574.475573]  ? __pfx_worker_thread+0x10/0x10\n\u003c4\u003e[  574.475580]  ? __pfx_worker_thread+0x10/0x10\n\u003c4\u003e[  574.475587]  kthread+0xcd/0x100\n\u003c4\u003e[  574.475597]  ? __pfx_kthread+0x10/0x10\n\u003c4\u003e[  574.475606]  ret_from_fork+0x31/0x50\n\u003c4\u003e[  574.475615]  ? __pfx_kthread+0x10/0x10\n\u003c4\u003e[  574.475623]  ret_from_fork_asm+0x1a/0x\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The uninitialized `xdp.rxq` is consumed in the XDP fast path during packet receive \u2014 `net_rx_action \u2192 __napi_poll \u2192 veth_poll \u2192 __dev_flush \u2192 bq_xmit_all \u2192 dev_map_bpf_prog_run` \u2014 so remote frames arriving at an XDP-enabled router, load balancer or container host drive the faulting code. This matches the repo\u0027s treatment of sibling XDP-redirect data-path bugs (CVE-2025-38246, CVE-2025-68341, CVE-2024-57932), all scored AV:N.\nAC:L - On an affected configuration every redirected frame deterministically dereferences the stale stack pointer; no race, timing window, or memory-layout condition must be won. For the multi-buffer variant the attacker simply sends an oversized frame to reach `bpf_xdp_frags_increase_tail()`/`bpf_xdp_shrink_data()`.\nPR:N - The attacker only has to put frames on the wire \u2014 no credentials, account, or authentication on the target are involved, and the fault occurs in softirq before any user context. The CAP_BPF/CAP_NET_ADMIN needed to attach XDP and populate the devmap is the victim\u0027s own legitimate configuration of a documented UAPI field, equivalent to enabling a network service, not a step the attacker performs.\nUI:N - Processing happens entirely in NAPI/softirq on frame arrival with no local user involved; the reported oops occurred against background MLD traffic. No victim action is required at attack time.\nS:U - The wild read, the mis-sized `memset()`, and the type-confused page free all occur in kernel memory on the same host, within a single security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `xdp.rxq` holds stale softirq-stack data that is dereferenced as a `struct xdp_rxq_info *`, so `ingress_ifindex` (`rxq-\u003edev-\u003eifindex`), `rx_queue_index` (`rxq-\u003equeue_index`), `rxq-\u003efrag_size` and `rxq-\u003emem` are read from an arbitrary kernel address and returned into the BPF program, which can export them to userspace via maps or the perf ring. That is an unbounded kernel memory disclosure primitive.\nI:H - `bpf_xdp_frags_increase_tail()` derives `tailroom` from the garbage `rxq-\u003efrag_size`, which can underflow and defeat the `offset \u003e tailroom` bound on the following `memset()`, giving a heap out-of-bounds write past the page fragment. `bpf_xdp_shrink_data()` additionally passes a garbage `xdp_mem_info` into `__xdp_return()`, causing a type-confused free across page_pool / page_frag / put_page / xsk_buff_free \u2014 the standard basis for heap corruption and privilege escalation.\nA:H - The commit documents a reproducible `BUG: kernel NULL pointer dereference` oops in softirq context (`bq_xmit_all+0x158`), and a non-zero stale pointer yields an equally fatal wild-address fault or corrupted-free panic. Either way the machine oopses on ordinary inbound traffic, a full denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:42:11.597Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fe068afb868660fe683a8391c6c17ecbe2254922"
        },
        {
          "url": "https://git.kernel.org/stable/c/a778fbe087c19f4ece5f5fc14173328f070c3803"
        },
        {
          "url": "https://git.kernel.org/stable/c/49454f09936a9a96edfb047156889879cb4001eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/9167d1c274a336e4763eeb3f3f9cb763c55df5aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca9984c5f0ab3690d98b13937b2485a978c8dd73"
        }
      ],
      "title": "bpf: devmap: provide rxq after redirect",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50162",
    "datePublished": "2024-11-07T09:31:39.141Z",
    "dateReserved": "2024-10-21T19:36:19.961Z",
    "dateUpdated": "2026-08-05T11:42:11.597Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}