Double Free Affecting container-selinux package, versions <2:2.229.0-3.module+el8.10.0+40223+e940a224


Severity

Recommended
0.0
high
0
10

Based on Rocky Linux security rating.

Threat Intelligence

Social Trends
EPSS
0.81% (53rd percentile)

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  • Snyk IDSNYK-ROCKY8-CONTAINERSELINUX-17961471
  • published14 Jul 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-33811  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 container-selinux to version 2:2.229.0-3.module+el8.10.0+40223+e940a224 or higher.
This issue was patched in RLSA-2026:38504.

NVD Description

Note: Versions mentioned in the description apply only to the upstream container-selinux package and not the container-selinux package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.

References

CVSS Base Scores

version 3.1