{"id":"CVE-2026-42577","state":"PUBLISHED","title":"Netty: epoll transport denial of service via RST on half-closed TCP connection","description":"Netty is an asynchronous, event-driven network application framework. From 4.2.0.Final to 4.2.13.Final , Netty's epoll transport fails to detect and close TCP connections that receive a RST after being half-closed, leading to stale channels that are never cleaned up and, in some code paths, a 100% CPU busy-loop in the event loop thread. This vulnerability is fixed in 4.2.13.Final.","publishedAt":"2026-05-13T18:00:28.744Z","updatedAt":"2026-05-14T15:39:44.314Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["netty netty"],"affected":[{"vendor":"netty","product":"netty","versions":[{"version":">= 4.2.0.Final, < 4.2.13.Final","status":"affected"}]}],"references":["https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p","https://github.com/netty/netty/pull/16689","https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d"],"weaknesses":["CWE-772"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42577.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42577","state":"PUBLISHED","datePublished":"2026-05-13T18:00:28.744Z","dateUpdated":"2026-05-14T15:39:44.314Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-28T17:26:12.085Z"},"containers":{"cna":{"title":"Netty: epoll transport denial of service via RST on half-closed TCP connection","descriptions":[{"lang":"en","value":"Netty is an asynchronous, event-driven network application framework. From 4.2.0.Final to 4.2.13.Final , Netty's epoll transport fails to detect and close TCP connections that receive a RST after being half-closed, leading to stale channels that are never cleaned up and, in some code paths, a 100% CPU busy-loop in the event loop thread. This vulnerability is fixed in 4.2.13.Final."}],"affected":[{"vendor":"netty","product":"netty","versions":[{"version":">= 4.2.0.Final, < 4.2.13.Final","status":"affected"}]}],"references":[{"url":"https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p","name":"https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/netty/netty/pull/16689","name":"https://github.com/netty/netty/pull/16689","tags":["x_refsource_MISC"]},{"url":"https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d","name":"https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-772","lang":"en","description":"CWE-772: Missing Release of Resource after Effective Lifetime","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-13T18:00:28.744Z"},"source":{"advisory":"GHSA-rwm7-x88c-3g2p","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-14T15:38:58.623257Z","id":"CVE-2026-42577","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-14T15:39:44.314Z"}}]}}}