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CVE-2026-74267: Linux

9.8

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.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_codel: Do not call qdisc_tree_reduce_backlog during peek before restoring qlen Whenever codel drops packets during peek, it calls qdisc_tree_reduce_backlog. An issue arises because it calls qdisc_tree_reduce_backlog before it reincrements the qlen. If qlen drops to zero, but peek returns an skb, the parent's qlen_notify callback will be executed even though codel still has 1 packet on the queue and, thus, will mistakenly deactivate the parent's class causing issues like a wild memory access when qfq has codel as a child: [ 36.339843][ T370] Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] SMP KASAN NOPTI [ 36.340408][ T370] KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127] [ 36.340737][ T370] CPU: 2 UID: 0 PID: 370 Comm: tc Not tainted 7.1.0-rc5-00287-g66e13b626592 #87 PREEMPT(full) [ 36.341113][ T370] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 36.341357][ T370] RIP: 0010:qfq_deactivate_agg (include/linux/list.h:1029 (discriminator 2) include/linux/list.h:1043 (discriminator 2) net/sched/sch_qfq.c:1369 (discriminator 2) net/sched/sch_qfq.c:1395 (discriminator 2)) sch_qfq [ 36.342221][ T370] RSP: 0018:ffff8881100ef370 EFLAGS: 00010216 [ 36.342422][ T370] RAX: 0000000000000000 RBX: ffff8881058a9568 RCX: dffffc0000000000 [ 36.342664][ T370] RDX: 1ffff11021064dc3 RSI: ffff888108326e00 RDI: dffffc0000000000 [ 36.342905][ T370] RBP: ffff8881058a8280 R08: dead000000000122 R09: 1bd5a00000000024 [ 36.343140][ T370] R10: fffffbfff2940329 R11: fffffbfff2940329 R12: 0000000000000000 [ 36.343383][ T370] R13: dead000000000100 R14: ffff8881058a9580 R15: ffff8881058a9578 [ 36.343631][ T370] FS: 00007fc04b0ca780(0000) GS:ffff888184fef000(0000) knlGS:0000000000000000 [ 36.343911][ T370] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.344116][ T370] CR2: 0000557c02

Засегнати продукти

  • Linux Linux: cc71a757da78dd4aa1b4a9b19cb011833730ccf2 преди bb9cfd874ee884117b33e92a002b9a45b48202f4; eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450 преди 7a05af7f58566682b73578b72ca8e53a268c43bd; 829c49b6b2ff45b043739168fd1245e4e1a91a30 преди eba49fd85995a3851c597fa2d214f8d21736e1d8; 2f9761a94bae33d26e6a81b31b36e7d776d93dc1 преди e8c6dbadf139cb14ea6ed14add6ed6e88504dedd; 4d55144b12e742404bb3f8fee6038bafbf45619d преди e4615aa6bb7802944ae790cb4b3ef8c1b7491af3; 342debc12183b51773b3345ba267e9263bdfaaef преди 755108bb7a5083e911294c416cfea605dc75632f; 342debc12183b51773b3345ba267e9263bdfaaef преди 91e0a793a72374c20ab31a40ccec21373e82e973; 342debc12183b51773b3345ba267e9263bdfaaef преди 52f1da34c9f4d5bdc1e8b44242da5c7ba8db85f3; 7a742a9506849d1c1aa71e36c89855ceddc7d58e; e73c838c80dccb9e4f19becc11d9f3cb4a27d483; a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31; 5.10.241 преди 5.10.261; 5.15.190 преди 5.15.212; 6.1.135 преди 6.1.178; 6.6.88 преди 6.6.145; 6.12.24 преди 6.12.97; 5.4.297 преди 5.5; 6.13.12 преди 6.14; 6.14.3 преди 6.15
  • Linux Linux: 6.15; преди 6.15; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74267: Linux | freedomonline.bg