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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-33811

Crash when handling long CNAME response in net

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Status
Published
Published
Updated
Assigning organization
Go

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Go standard library net

Default version status: unaffected

  • 0 to < 1.25.10affected
  • 1.26.0-0 to < 1.26.3affected

References