NULL Pointer Dereference Affecting kernel-64k-debug-modules-internal package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (13th percentile)

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  • Snyk IDSNYK-CENTOS9-KERNEL64KDEBUGMODULESINTERNAL-9730430
  • published17 Apr 2025
  • disclosed16 Apr 2025

Introduced: 16 Apr 2025

NewCVE-2025-22063  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

There is no fixed version for Centos:9 kernel-64k-debug-modules-internal.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-debug-modules-internal package and not the kernel-64k-debug-modules-internal package as distributed by Centos. See How to fix? for Centos:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets

When calling netlbl_conn_setattr(), addr->sa_family is used to determine the function behavior. If sk is an IPv4 socket, but the connect function is called with an IPv6 address, the function calipso_sock_setattr() is triggered. Inside this function, the following code is executed:

sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;

Since sk is an IPv4 socket, pinet6 is NULL, leading to a null pointer dereference.

This patch fixes the issue by checking if inet6_sk(sk) returns a NULL pointer before accessing pinet6.

CVSS Base Scores

version 3.1