Double Free Affecting udica package, versions <0:0.2.6-21.module+el8.10.0+1843+6892ab28


Severity

Recommended
0.0
high
0
10

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.81% (53rd percentile)

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  • Snyk IDSNYK-ROCKY8-UDICA-17961508
  • 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 udica to version 0:0.2.6-21.module+el8.10.0+1843+6892ab28 or higher.
This issue was patched in RLSA-2026:38504.

NVD Description

Note: Versions mentioned in the description apply only to the upstream udica package and not the udica 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