{"id":"CVE-2026-33811","revision":"1bbedfd55ee44addb73069c3a432e291","records":[{"revision":"1bbedfd55ee44addb73069c3a432e291","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-33811","aliases":[],"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":"2026-05-07T19:41:19.285+00:00","modifiedAt":"2026-09-18T12:04:39.146+00:00","affected":[{"ecosystem":"https://pkg.go.dev","name":"net","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"net\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"net\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.25.10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"1.26.0-0\",\n                            \"lessThan\": \"1.26.3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"cgoResSearch\"\n                        },\n                        {\n                            \"name\": \"LookupCNAME\"\n                        },\n                        {\n                            \"name\": \"Resolver.LookupCNAME\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"references":["https://go.dev/issue/78803","https://go.dev/cl/767860","https://groups.google.com/g/golang-announce/c/qcCIEXso47M","https://pkg.go.dev/vuln/GO-2026-4981"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-33811","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-33811","identifiers":["CVE-2026-33811"]},"retained":false,"historicalAffected":[]}],"coverage":[]}