CVE-2025-38112

MediumCVSS 4.7/10Last modified Nov 5, 2026

Description

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.

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-367

Affected software

VendorProductVersions
LinuxLinux>= 8934ce2fd08171e8605f7fada91ee7619fe17ab8, < c2b26638476baee154920bb587fc94ff1bf04336; >= 8934ce2fd08171e8605f7fada91ee7619fe17ab8, < 6fa68d7eab34d448a61aa24ea31e68b3231ed20d; >= 8934ce2fd08171e8605f7fada91ee7619fe17ab8, < 8926a7ef1977a832dd6bf702f1a99303dbf15b15; >= 8934ce2fd08171e8605f7fada91ee7619fe17ab8, < ff55c85a923e043d59d26b20a673a1b4a219c310; >= 8934ce2fd08171e8605f7fada91ee7619fe17ab8, < 1e0de7582ceccbdbb227d4e0ddf65732f92526da; >= 8934ce2fd08171e8605f7fada91ee7619fe17ab8, < 1b367ba2f94251822577daed031d6b9a9e11ba91; >= 8934ce2fd08171e8605f7fada91ee7619fe17ab8, < 2660a544fdc0940bba15f70508a46cf9a6491230
LinuxLinux4.17

References

Timeline

Published
Jul 3, 2025
Last modified
Nov 5, 2026
NVD status
Analyzed

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CVE-2025-38112: Medium severity, CVSS 4.7 | Vulnix