CVE-2025-38112

MEDIUM

MEDIUM Priority: 0.01 BB Relevance: 24/100

Published: 2025-07-03 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

No Interaction

CVSS Vector Breakdown

AV: Local

AC: High

PR: Low

UI: None

S: Unchanged

C: None

I: None

A: High

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.

Weakness Classification (1)

CWE-367

Affected Software (11)

Vendor	Product	Version
Linux	Linux	8934ce2fd08171e8605f7fada91ee7619fe17ab8 < c2b26638476baee154920bb587fc94ff1bf04336
Linux	Linux	8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 6fa68d7eab34d448a61aa24ea31e68b3231ed20d
Linux	Linux	8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 8926a7ef1977a832dd6bf702f1a99303dbf15b15
Linux	Linux	8934ce2fd08171e8605f7fada91ee7619fe17ab8 < ff55c85a923e043d59d26b20a673a1b4a219c310
Linux	Linux	8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 1e0de7582ceccbdbb227d4e0ddf65732f92526da
Linux	Linux	8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 1b367ba2f94251822577daed031d6b9a9e11ba91
Linux	Linux	8934ce2fd08171e8605f7fada91ee7619fe17ab8 < 2660a544fdc0940bba15f70508a46cf9a6491230
Linux	Linux	4.17
debian	debian_linux	11.0
linux	linux_kernel	4.17 – 5.10.239
linux	linux_kernel	6.16