CVE-2024-26739 Affecting kernel-rt package, versions <0:5.14.0-427.37.1.el9_4


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-ALMALINUX9-KERNELRT-8324344
  • published4 Nov 2024
  • disclosed24 Sept 2024

Introduced: 24 Sep 2024

CVE-2024-26739  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 kernel-rt to version 0:5.14.0-427.37.1.el9_4 or higher.
This issue was patched in ALSA-2024:6997.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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

net/sched: act_mirred: don't override retval if we already lost the skb

If we're redirecting the skb, and haven't called tcf_mirred_forward(), yet, we need to tell the core to drop the skb by setting the retcode to SHOT. If we have called tcf_mirred_forward(), however, the skb is out of our hands and returning SHOT will lead to UaF.

Move the retval override to the error path which actually need it.

CVSS Scores

version 3.1