Use After Free Affecting kpatch-patch-5_14_0-362_8_1 package, versions <0:1-2.el9_3


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.61% (48th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL9-KPATCHPATCH514036281-13066466
  • published26 Sept 2025
  • disclosed6 Sept 2023

Introduced: 6 Sep 2023

CVE-2023-4622  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:9 kpatch-patch-5_14_0-362_8_1 to version 0:1-2.el9_3 or higher.
This issue was patched in RHSA-2024:0340.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kpatch-patch-5_14_0-362_8_1 package and not the kpatch-patch-5_14_0-362_8_1 package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation.

The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.

We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c (or backported equivalents).

CVSS Base Scores

version 3.1