CVE-2025-38112
In the Linux kernel, the following vulnerability has been resolved: net: Fix TOCTOU issue in sk_is_readable() sk->sk_prot->sock_is_readable is a valid function pointer when sk resides in a sockmap. After the last sk_psock_put() (which usually happens when socket is removed from sockmap), sk->sk_prot gets restored and sk->sk_prot->sock_is_readable becomes NULL. This makes sk_is_readable() racy, if the value of sk->sk_prot is reloaded after the initial check. Which in turn may lead to a null pointer dereference. Ensure the function pointer does not turn NULL after the check.
- Score
- CVSS 3.1 4.7 Medium
- Status
- Analyzed - 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- Published
- 2025-07-03
- Last modified
- 2026-05-11
- Weaknesses
- CWE-367
Affected products
References
- https://git.kernel.org/stable/c/1b367ba2f94251822577daed031d6b9a9e11ba91
- https://git.kernel.org/stable/c/1e0de7582ceccbdbb227d4e0ddf65732f92526da
- https://git.kernel.org/stable/c/2660a544fdc0940bba15f70508a46cf9a6491230
- https://git.kernel.org/stable/c/6fa68d7eab34d448a61aa24ea31e68b3231ed20d
- https://git.kernel.org/stable/c/8926a7ef1977a832dd6bf702f1a99303dbf15b15
- https://git.kernel.org/stable/c/c2b26638476baee154920bb587fc94ff1bf04336
- https://git.kernel.org/stable/c/ff55c85a923e043d59d26b20a673a1b4a219c310
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
