CVE-2025-38112

MediumCVSS 4.7/10Last modified Jun 17, 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

No affected versions have been published.

Timeline

Published
Jul 3, 2025
Last modified
Jun 17, 2026
NVD status
Analyzed

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