{"id":"CVE-2026-73508","revision":"4c442fad4f1d46d09e1fb17a237cecd0","records":[{"revision":"4c442fad4f1d46d09e1fb17a237cecd0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73508","aliases":[],"title":"Netty: Memory Leak in DNS Record Decoder via Malformed Domain Names","description":"Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.dns.AbstractDnsRecord, io.netty.handler.codec.dns.DefaultDnsRecordDecoder.decodeRecord(), and io.netty.handler.codec.dns.DnsCodecUtil.decompressDomainName() failed to release retained or newly allocated ByteBuf objects when IDN.toASCII() or encodeDomainName() rejected a malformed domain name, allowing unauthenticated remote DNS packets to leak direct memory incrementally until denial of service. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.","state":0,"publishedAt":"2026-08-13T14:27:20.298+00:00","modifiedAt":"2026-08-13T17:52:58.403+00:00","affected":[{"ecosystem":"Vendor product","name":"netty","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"netty\",\n                    \"product\": \"netty\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.1.136.Final\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.2.0.Final, < 4.2.16.Final\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/netty/netty/security/advisories/GHSA-mfg7-5gfp-c4w3","https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b","https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6","https://github.com/netty/netty/releases/tag/netty-4.1.136.Final","https://github.com/netty/netty/releases/tag/netty-4.2.16.Final"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73508","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73508","identifiers":["CVE-2026-73508"]},"retained":false,"historicalAffected":[]}],"coverage":[]}