CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
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: netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag The DEV_PATH_BR_VLAN_UNTAG case post-decrements info->num_encaps inside WARN_ON_ONCE(). num_encaps is u8, so if it's already 0 the decrement still happens and wraps it to 255. The break only leaves the inner switch -- a later path entry can set info->indev back to a real device, and we end up returning with num_encaps == 255. nft_dev_forward_path() then walks info.encap[] (size 2) up to num_encaps, which means an OOB stack read and a bogus count copied into the route descriptor. Should only happen on a malformed bridge path stack, hence the WARN, but worth handling sanely. Move the decrement out of the WARN. [ While at this, remove the WARN_ON_ONCE since this can only happen with a buggy bridge path stack --pablo ].
Засегнати продукти
- Linux Linux: e990cef6516daa4e1e236433579e333f74fd38cb преди 9a4e3a9017ba3da2de187b72ed6545641a0d0a84; e990cef6516daa4e1e236433579e333f74fd38cb преди 1b52aeb40c9f04bf50eeb4ea09142139d163e239; e990cef6516daa4e1e236433579e333f74fd38cb преди ee8440bb000fff4ef8acbfc99652851e9ca0a35b; e990cef6516daa4e1e236433579e333f74fd38cb преди 547ea9f567498e4accc89e7816264f15a1a0629f; e990cef6516daa4e1e236433579e333f74fd38cb преди 2f55fa28011c97d6495d5787808db10a8c2d690d; e990cef6516daa4e1e236433579e333f74fd38cb преди e052f920773b73be49eb4d8702a9f85de7464363
- Linux Linux: 5.13; преди 5.13; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.57 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък
История
- 28 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-80634
- https://nvd.nist.gov/vuln/detail/CVE-2026-80634
- https://git.kernel.org/stable/c/9a4e3a9017ba3da2de187b72ed6545641a0d0a84
- https://git.kernel.org/stable/c/1b52aeb40c9f04bf50eeb4ea09142139d163e239
- https://git.kernel.org/stable/c/ee8440bb000fff4ef8acbfc99652851e9ca0a35b
- https://git.kernel.org/stable/c/547ea9f567498e4accc89e7816264f15a1a0629f
- https://git.kernel.org/stable/c/2f55fa28011c97d6495d5787808db10a8c2d690d
- https://git.kernel.org/stable/c/e052f920773b73be49eb4d8702a9f85de7464363