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: bpf: Reset register bounds before narrowing retval range in check_mem_access() When the BPF verifier processes a context load of an LSM hook return value, it calls __mark_reg_s32_range() to narrow the register to the hook's valid range. However, __mark_reg_s32_range() intersects the new range with the register's existing bounds using max_t()/min_t() rather than replacing them. If the destination register carries stale bounds from a prior instruction (e.g. BPF_MOV64_IMM), the intersection can produce a range narrower than reality. The verifier then believes it knows the register's exact value, while at runtime the actual hook return value is loaded, creating a verifier/runtime mismatch that can be used to bypass BPF memory safety checks. The else branch already calls mark_reg_unknown() to reset register state before any narrowing. Apply the same reset in the is_retval path so stale bounds are cleared before __mark_reg_s32_range() intersects.
Засегнати продукти
- Linux Linux: 5d99e198be279045e6ecefe220f5c52f8ce9bfd5 преди bde92f65042ec14389782dd223f706bf6b59ce5d; 5d99e198be279045e6ecefe220f5c52f8ce9bfd5 преди 0993dc5fc619c0b25ab1310cb11d65e78351c0fe; 5d99e198be279045e6ecefe220f5c52f8ce9bfd5 преди 5a55f9aecc08990940e70f0c7048a80850c5a16a; 5d99e198be279045e6ecefe220f5c52f8ce9bfd5 преди 5e0b273e0a62cc04ec338c7b502797c66c2ed42a; 1050727d83e70449991c29dd1cf29fe936a63da3; 27ca3e20fe80be85a92b10064dfeb56cb2564b1c; 6.10.13 преди 6.11; 6.11.2 преди 6.12
- Linux Linux: 6.12; преди 6.12; 6.12.103 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *
История
- 15 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-72111
- https://nvd.nist.gov/vuln/detail/CVE-2026-72111
- https://git.kernel.org/stable/c/bde92f65042ec14389782dd223f706bf6b59ce5d
- https://git.kernel.org/stable/c/0993dc5fc619c0b25ab1310cb11d65e78351c0fe
- https://git.kernel.org/stable/c/5a55f9aecc08990940e70f0c7048a80850c5a16a
- https://git.kernel.org/stable/c/5e0b273e0a62cc04ec338c7b502797c66c2ed42a