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.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: net/atm: fix slab-out-of-bounds read in vcc_setsockopt() vcc_setsockopt() contained an ineffective optlen check: if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) return -EINVAL; If __SO_LEVEL_MATCH(optname, level) evaluated to false (e.g. if the caller passed a mismatched level), the length check optlen != __SO_SIZE(optname) was short-circuited and bypassed. Execution then fell through to switch(optname), calling copy_from_sockptr() assuming optval contained sufficient space. Furthermore, even if level matched, a cgroup BPF setsockopt filter could shrink optlen after entry. Because copy_from_sockptr() on kernel pointers uses memcpy(), this leads to a KASAN slab-out-of-bounds read when optlen is smaller than the expected structure size. Fix this by using copy_safe_from_sockptr(), which unconditionally validates that optlen is at least the expected size before copying. Also change the local 'value' variable type from 'unsigned long' to 'int' so that SO_SETCLP matches its sizeof(int) ABI encoding on 64-bit systems.
Засегнати продукти
- Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди b3bcd5d65ac03c15787b2a5b36c718e26a689336; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 35f258fee9ed358c6d0f57f91c30bf029c3724af; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 6eb6af88710977eb529b558a07294874d8c40c4d; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 9f77c1ab382188f5b51982fab6d913443b6dc59f; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 2c5988c7349c0b64a7e0441bfc6e1dca54f7116a; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d0c80dbb970439bd2eeb0e5effff8c16a5f4e1e3
- Linux Linux: 2.6.12; преди 2.6.12; 6.1.183 до 6.1.*; 6.6.152 до 6.6.*; 6.12.104 до 6.12.*; 6.18.45 до 6.18.*; 7.1.9 до 7.1.*; от 7.2 нататък
История
- 22 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-74689
- https://nvd.nist.gov/vuln/detail/CVE-2026-74689
- https://git.kernel.org/stable/c/b3bcd5d65ac03c15787b2a5b36c718e26a689336
- https://git.kernel.org/stable/c/35f258fee9ed358c6d0f57f91c30bf029c3724af
- https://git.kernel.org/stable/c/6eb6af88710977eb529b558a07294874d8c40c4d
- https://git.kernel.org/stable/c/9f77c1ab382188f5b51982fab6d913443b6dc59f
- https://git.kernel.org/stable/c/2c5988c7349c0b64a7e0441bfc6e1dca54f7116a
- https://git.kernel.org/stable/c/d0c80dbb970439bd2eeb0e5effff8c16a5f4e1e3