NULL Pointer Dereference Affecting kernel-64k-debug-modules-extra package, versions <0:6.12.0-55.16.1.el10_0


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-ROCKY10-KERNEL64KDEBUGMODULESEXTRA-13294741
  • published5 Oct 2025
  • disclosed31 Jan 2025

Introduced: 31 Jan 2025

CVE-2025-21669  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:10 kernel-64k-debug-modules-extra to version 0:6.12.0-55.16.1.el10_0 or higher.
This issue was patched in RLSA-2025:8669.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-debug-modules-extra package and not the kernel-64k-debug-modules-extra package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:10 relevant fixed versions and status.

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

vsock/virtio: discard packets if the transport changes

If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport.

A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find vsk-&gt;transport at NULL, leading to a NULL pointer dereference.

CVSS Base Scores

version 3.1