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CVE-2026-64435: Linux, състезание за ресурс

8.2

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: audit: Fix data races of skb_queue_len() readers on audit_queue Multiple readers access audit_queue.qlen via skb_queue_len() without holding the queue lock or using READ_ONCE(), while kauditd writes to this field via the skb_dequeue() → __skb_unlink() path with WRITE_ONCE() protected by a spinlock. This constitutes data races. All affected skb_queue_len(&audit_queue) call sites: - kauditd_thread() wait_event_freezable() condition - audit_receive_msg() AUDIT_GET handler (s.backlog assignment) - audit_receive() backlog check - audit_log_start() backlog check and pr_warn() KCSAN reports the following conflicting access pattern (one example): ================================================================== BUG: KCSAN: data-race in audit_log_start / skb_dequeue write (marked) to 0xffffffff8512ee20 of 4 bytes by task 661 on cpu 57: skb_dequeue+0x70/0xf0 kauditd_send_queue+0x71/0x220 kauditd_thread+0x1cb/0x430 kthread+0x1c2/0x210 ret_from_fork+0x162/0x1a0 ret_from_fork_asm+0x1a/0x30 read to 0xffffffff8512ee20 of 4 bytes by task 36586 on cpu 1: audit_log_start+0x2a0/0x6b0 audit_core_dumps+0x64/0xa0 do_coredump+0x14b/0x1260 get_signal+0xeb2/0xf70 arch_do_signal_or_restart+0x41/0x170 exit_to_user_mode_loop+0xa2/0x1c0 do_syscall_64+0x1a3/0x1c0 entry_SYSCALL_64_after_hwframe+0x76/0xe0 value changed: 0x00000001 -> 0x00000000 ================================================================== Resolve the race by switching to lockless helper skb_queue_len_lockless(), which internally uses READ_ONCE() and properly pairs with the WRITE_ONCE() write accesses already present on the writer side. [PM: line length tweak]

Засегнати продукти

  • Linux Linux: 3197542482df22c2a131d4a813280bd7c54cedf5 преди 69f98fff30bdaa72b0cb0e7e078ab6456a0a59b0; 3197542482df22c2a131d4a813280bd7c54cedf5 преди b35597bdae1a5d8395da4b9baa993b9b71f74d68; 3197542482df22c2a131d4a813280bd7c54cedf5 преди e575dabb805252e3113fdc3f56f6ecacfde422d0; 3197542482df22c2a131d4a813280bd7c54cedf5 преди 7ff42312ccde549f8c698723822c7db35107a39b; 3197542482df22c2a131d4a813280bd7c54cedf5 преди a3d85dec60bb0622360fc176b2a51abdbe2ff0ad; 3197542482df22c2a131d4a813280bd7c54cedf5 преди fe997a84a385f840b593ead92e575503a5046cee; 3197542482df22c2a131d4a813280bd7c54cedf5 преди c5186201fa7030289cc4fe23fae87a3fcb566856; 3197542482df22c2a131d4a813280bd7c54cedf5 преди c9a71daaecb2fb1d8c704545cc0b1c920b9bf5d7
  • Linux Linux: 4.10; преди 4.10; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.96 до 6.12.*; 6.18.39 до 6.18.*; 7.1.4 до 7.1.*; от 7.2 нататък

Вид слабост

История

  • 25 юли 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-64435: Linux, състезание за ресурс | freedomonline.bg