{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-73508","sourceIdentifier":"security-advisories@github.com","published":"2026-08-13T15:20:17.463","lastModified":"2026-09-23T15:39:29.417","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"netty","product":"netty","versions":[{"version":"\u003c 4.1.136.Final","status":"affected"},{"version":"\u003e= 4.2.0.Final, \u003c 4.2.16.Final","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-13T17:49:08.822510Z","id":"CVE-2026-73508","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-772"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*","versionEndExcluding":"4.1.136","matchCriteriaId":"3A15093F-C6A7-4FCF-81BA-939CD522D1DD"},{"vulnerable":true,"criteria":"cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2.0","versionEndExcluding":"4.2.16","matchCriteriaId":"4DE4BC35-4405-49B5-A2A8-A700C7F63C8B"}]}]}],"references":[{"url":"https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/netty/netty/releases/tag/netty-4.1.136.Final","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/netty/netty/releases/tag/netty-4.2.16.Final","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/netty/netty/security/advisories/GHSA-mfg7-5gfp-c4w3","source":"security-advisories@github.com","tags":["Vendor Advisory"]}]}}