Riskcovery

CVE-2026-33811

Crash when handling long CNAME response in net

State
Published
Severity
7.5 High
Published
May 7, 2026
Updated
Sep 18, 2026
Reserved
Mar 23, 2026

Read the record on cve.org

Description

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

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCISA-ADP
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hredhat-SADP

Weaknesses

  • CWE-1341 Multiple Releases of Same Resource or Handle

Affected Products

ProductVersions
netGo standard library
  • before 1.25.10Affected
  • 1.26.0-0 to before 1.26.3Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.