Use After Free Affecting kernel-default-livepatch package, versions <5.14.21-150500.55.110.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-SLES155-KERNELDEFAULTLIVEPATCH-10570483
  • published1 Jul 2025
  • disclosed30 Jun 2025

Introduced: 30 Jun 2025

NewCVE-2022-49921  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 kernel-default-livepatch to version 5.14.21-150500.55.110.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-default-livepatch package and not the kernel-default-livepatch package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

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

net: sched: Fix use after free in red_enqueue()

We can't use "skb" again after passing it to qdisc_enqueue(). This is basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb len before calling child enqueue").

CVSS Base Scores

version 3.1