{"id":"GO-2026-4981","revision":"3cfd1ee2542f4fc292e80cb4a991d832","records":[{"revision":"3cfd1ee2542f4fc292e80cb4a991d832","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-4981","aliases":["BIT-golang-2026-33811","CVE-2026-33811"],"title":"Crash when handling long CNAME response in net","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.","state":0,"publishedAt":"2026-05-07T19:21:40+00:00","modifiedAt":"2026-09-29T10:56:43.3050657+00:00","affected":[{"ecosystem":"Go","name":"stdlib","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.25.10"},{"kind":"introduced","version":"1.26.0-0"},{"kind":"fixed","version":"1.26.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://go.dev/issue/78803","https://go.dev/cl/767860","https://groups.google.com/g/golang-announce/c/qcCIEXso47M"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-4981","license":"OSV · upstream source license applies","key":"osv:GO-2026-4981","identifiers":["GO-2026-4981","BIT-golang-2026-33811","CVE-2026-33811"]},"retained":false,"historicalAffected":[]}],"coverage":[]}