CVE-2026-33811 Affecting rhc package, versions <1:0.2.5-8.el8_10


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.81% (53rd percentile)

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  • Snyk IDSNYK-RHEL8-RHC-17099150
  • published30 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-33811  (opens in a new tab)
CWE-1341  (opens in a new tab)

How to fix?

Upgrade RHEL:8 rhc to version 1:0.2.5-8.el8_10 or higher.
This issue was patched in RHSA-2026:36776.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rhc package and not the rhc package as distributed by RHEL. See How to fix? for RHEL: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.

CVSS Base Scores

version 3.1