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: nfsd: avoid leaking pre-allocated openowner on unconfirmed retry race When find_or_alloc_open_stateowner() encounters an unconfirmed owner, it calls release_openowner() and sets oo = NULL. Control then falls through past the `if (oo)` guard -- which would have freed any pre-allocated `new` -- and unconditionally executes `new = alloc_stateowner(...)`. If `new` was already allocated on a prior iteration, the pointer is silently overwritten and the previous allocation (slab object + owner name buffer) is leaked. This requires a race: two NFSv4.0 OPEN threads with the same owner string, where a concurrent thread inserts a new unconfirmed owner into the hash between retry iterations. The window is narrow but repeatable under adversarial conditions. Fix by adding `goto retry` after `oo = NULL` so the already-allocated `new` is reused on the next iteration rather than overwritten.
Засегнати продукти
- Linux Linux: 23df17788c6212809848f836b10c4f85b16843a5 преди c9aefb2b5f11337c9202c5bd0c45d71198449718; 23df17788c6212809848f836b10c4f85b16843a5 преди 017a6150106b054cc84d1b0582d97bd3a74d4281; 23df17788c6212809848f836b10c4f85b16843a5 преди a10bf67fe06469a71a401f72f328237345d553c0; 23df17788c6212809848f836b10c4f85b16843a5 преди 57aee7a35bb12753057c5b65d72d1f46c0e95b07
- Linux Linux: 6.10; преди 6.10; 6.12.95 до 6.12.*; 6.18.38 до 6.18.*; 7.1.3 до 7.1.*; от 7.2 нататък
Вид слабост
История
- 19 юли 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-53394
- https://nvd.nist.gov/vuln/detail/CVE-2026-53394
- https://git.kernel.org/stable/c/c9aefb2b5f11337c9202c5bd0c45d71198449718
- https://git.kernel.org/stable/c/017a6150106b054cc84d1b0582d97bd3a74d4281
- https://git.kernel.org/stable/c/a10bf67fe06469a71a401f72f328237345d553c0
- https://git.kernel.org/stable/c/57aee7a35bb12753057c5b65d72d1f46c0e95b07