{"id":"CVE-2026-42577","summary":"Netty: epoll transport denial of service via RST on half-closed TCP connection","details":"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.","aliases":["GHSA-rwm7-x88c-3g2p"],"modified":"2026-09-23T14:18:24.544110Z","published":"2026-05-13T18:00:28.744Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-772"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42577.json","unresolved_ranges":[{"extracted_events":[{"introduced":"4.2.0.Final"},{"fixed":"4.2.13.Final"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42577.json"},{"type":"ADVISORY","url":"https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42577"},{"type":"FIX","url":"https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d"},{"type":"FIX","url":"https://github.com/netty/netty/pull/16689"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/netty/netty","events":[{"introduced":"0"},{"fixed":"0ec3d97fab376e243d328ac95fbd288ba0f6e22d"}],"database_specific":{"source":"REFERENCES"}}],"versions":["netty-4.2.12.Final","netty-4.2.11.Final","netty-4.2.10.Final","netty-4.2.9.Final","netty-4.2.8.Final","netty-4.2.7.Final","netty-4.2.6.Final","netty-4.2.5.Final","netty-4.2.4.Final","netty-4.2.3.Final","netty-4.2.2.Final","netty-4.2.1.Final","netty-4.2.0.Final","netty-4.2.0.RC4","netty-4.2.0.RC3","netty-4.2.0.RC2","netty-4.2.0.RC1","netty-4.2.0.Beta1","netty-4.2.0.Alpha5","netty-4.2.0.Alpha4","netty-4.2.0.Alpha3","netty-4.2.0.Alpha2","netty-4.2.0.Alpha1","netty-4.1.109.Final","netty-4.1.108.Final","netty-4.1.107.Final","netty-4.1.106.Final","netty-4.1.105.Final","netty-4.1.104.Final","netty-4.1.103.Final","netty-4.1.102.Final","netty-4.1.101.Final","netty-4.1.100.Final","netty-4.1.99.Final","netty-4.1.98.Final","netty-4.1.97.Final","netty-4.1.96.Final","netty-4.1.95.Final","netty-4.1.94.Final","netty-4.1.93.Final","netty-4.1.92.Final","netty-4.1.91.Final","netty-4.1.90.Final","netty-4.1.89.Final","netty-4.1.88.Final","netty-4.1.87.Final","netty-4.1.86.Final","netty-4.1.85.Final","netty-4.1.84.Final","netty-4.1.83.Final","netty-4.1.82.Final","netty-4.1.81.Final","netty-4.1.80.Final","netty-4.1.79.Final","netty-4.1.78.Final","netty-4.1.77.Final","netty-4.1.76.Final","netty-4.1.75.Final","netty-4.1.74.Final","netty-4.1.73.Final","netty-4.1.72.Final","netty-4.1.71.Final","netty-4.1.70.Final","netty-4.1.69.Final","netty-4.1.68.Final","netty-4.1.67.Final","netty-4.1.66.Final","netty-4.1.65.Final","netty-4.1.64.Final","netty-4.1.63.Final","netty-4.1.62.Final","netty-4.1.61.Final","netty-4.1.60.Final","netty-4.1.59.Final","netty-4.1.58.Final","netty-4.1.57.Final","netty-4.1.56.Final","netty-4.1.55.Final","netty-4.1.54.Final","netty-4.1.53.Final","netty-4.1.52.Final","netty-4.1.51.Final","netty-4.1.50.Final","netty-4.1.49.Final","netty-4.1.48.Final","netty-4.1.47.Final","netty-4.1.46.Final","netty-4.1.45.Final","netty-4.1.44.Final","netty-4.1.43.Final","netty-4.1.42.Final","netty-4.1.41.Final","netty-4.1.40.Final","netty-4.1.39.Final","netty-4.1.38.Final","netty-4.1.37.Final","netty-4.1.36.Final","netty-4.1.35.Final","netty-4.1.34.Final","netty-4.1.33.Final","netty-4.1.32.Final","netty-4.1.31.Final","netty-4.1.30.Final","netty-4.1.29.Final","netty-4.1.28.Final","netty-4.1.27.Final","netty-4.1.26.Final","netty-4.1.25.Final","netty-4.1.24.Final","netty-4.1.23.Final","netty-4.1.22.Final","netty-4.1.21.Final","netty-4.1.20.Final","netty-4.1.19.Final","netty-4.1.18.Final","netty-4.1.17.Final","netty-4.1.16.Final","netty-4.1.15.Final","netty-4.1.14.Final","netty-4.1.13.Final","netty-4.1.12.Final","netty-4.1.11.Final","netty-4.1.10.Final","netty-4.1.9.Final","netty-4.1.8.Final","netty-4.1.7.Final","netty-4.1.6.Final","netty-4.1.5.Final","netty-4.1.4.Final","netty-4.1.3.Final","netty-4.1.2.Final","netty-4.1.1.Final","netty-4.1.0.Final","netty-4.1.0.CR7","netty-4.1.0.CR6","netty-4.1.0.CR5","netty-4.1.0.CR4","netty-4.1.0.CR3","netty-4.1.0.CR2","netty-4.1.0.CR1","netty-4.1.0.Beta8","netty-4.1.0.Beta7","netty-4.1.0.Beta6","netty-4.1.0.Beta5","netty-4.1.0.Beta4","netty-4.1.0.Beta3","netty-4.1.0.Beta2","netty-4.1.0.Beta1","netty-4.0.15.Final","netty-4.0.14.Final","netty-4.0.14.Beta1","netty-4.0.13.Final","netty-4.0.12.Final","netty-4.0.11.Final","netty-4.0.10.Final","netty-4.0.8.Final","netty-4.0.7.Final","netty-4.0.6.Final","netty-4.0.5.Final","netty-4.0.4.Final","netty-4.0.3.Final","netty-4.0.2.Final","netty-4.0.1.Final","netty-4.0.0.Final","netty-4.0.0.CR9","netty-4.0.0.CR8","netty-4.0.0.CR7","netty-4.0.0.CR5","netty-4.0.0.CR4","netty-4.0.0.CR3","netty-4.0.0.CR2","netty-4.0.0.CR1","netty-4.0.0.Beta3","netty-4.0.0.Beta2","netty-4.0.0.Beta1","netty-4.0.0.Alpha8","netty-4.0.0.Alpha7","netty-4.0.0.Alpha6","netty-4.0.0.Alpha5","netty-4.0.0.Alpha4","netty-4.0.0.Alpha3","netty-4.0.0.Alpha2","netty-4.0.0.Alpha1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42577.json",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