CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: dm-pcache: fix use-after-free and invalid seg operations in kset_replay() In kset_replay, when key->seg_gen is stale (key->seg_gen < key->cache_pos.cache_seg->gen), cache_key_put(key) is called but then key->cache_pos.cache_seg is accessed as the argument to cache_seg_get(). This is a use-after-free on the freed key memory. Although mempool recycled memory is not immediately reclaimed or overwritten in practice, this is still a potential UAF bug. Additionally, for expired invalid keys, setting the cache->seg_map bit and calling cache_seg_get() is unreasonable since the corresponding segment data is no longer valid. Fix both issues by moving cache_seg_get() and __set_bit() after the gen check, so they only execute for valid keys, and using continue to skip invalid keys.
Засегнати продукти
- Linux Linux: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 преди 1894fc7a3bab90143dcd26ef8ee27040ef4a7501; 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 преди f39a3e9cc5946473e16d6f5071b2ee0216c56d06; 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 преди c2e894eac398b258f12fdec73ed6ba081047f7b3
- Linux Linux: 6.18; преди 6.18; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; 7.3 до *
История
- 11 септември 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-80955
- https://nvd.nist.gov/vuln/detail/CVE-2026-80955
- https://git.kernel.org/stable/c/1894fc7a3bab90143dcd26ef8ee27040ef4a7501
- https://git.kernel.org/stable/c/f39a3e9cc5946473e16d6f5071b2ee0216c56d06
- https://git.kernel.org/stable/c/c2e894eac398b258f12fdec73ed6ba081047f7b3