Use After Free Affecting kernel-modules-extra-matched package, versions <0:6.12.0-124.8.1.el10_1


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.23% (14th percentile)

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  • Snyk IDSNYK-RHEL10-KERNELMODULESEXTRAMATCHED-13890265
  • published12 Nov 2025
  • disclosed27 Feb 2025

Introduced: 27 Feb 2025

CVE-2025-21791  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:10 kernel-modules-extra-matched to version 0:6.12.0-124.8.1.el10_1 or higher.
This issue was patched in RHSA-2025:20095.

NVD Description

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

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

vrf: use RCU protection in l3mdev_l3_out()

l3mdev_l3_out() can be called without RCU being held:

raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out()

Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.

CVSS Base Scores

version 3.1