NetSight
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medium4.7

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…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.17 before 5.10.239
from 5.11 before 5.15.186
from 5.16 before 6.1.142
from 6.2 before 6.6.94
from 6.7 before 6.12.34
from 6.13 before 6.15.3
DebianDebian Linux
Version 11.0

Weakness classification

CWE-367

References