Use After Free Affecting libperf package, versions <0:5.14.0-687.46.1.el9_8


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.12% (3rd percentile)

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  • Snyk IDSNYK-ROCKY9-LIBPERF-19691821
  • published12 Sept 2026
  • disclosed8 May 2026

Introduced: 8 May 2026

CVE-2026-43339  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 libperf to version 0:5.14.0-687.46.1.el9_8 or higher.
This issue was patched in RLSA-2026:66180.

NVD Description

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

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

ipv6: prevent possible UaF in addrconf_permanent_addr()

The mentioned helper try to warn the user about an exceptional condition, but the message is delivered too late, accessing the ipv6 after its possible deletion.

Reorder the statement to avoid the possible UaF; while at it, place the warning outside the idev->lock as it needs no protection.

CVSS Base Scores

version 3.1