GO-2026-4981

vendorUSosv

Crash when handling long CNAME response in net

view advisory published 2026-05-07Licence: per source

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

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2026-33811UShigh7.5—
When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.
02

references

External citations — patches, advisories, analysis.

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