{"id":"CVE-2016-4970","aliases":["GHSA-rv63-gqm8-9w8q"],"url":"https://o3.security/vulnerability/CVE-2016-4970","summary":"Loop with Unreachable Exit Condition in Netty","details":"handler/ssl/OpenSslEngine.java in Netty 4.0.x before 4.0.37.Final and 4.1.x before 4.1.1.Final allows remote attackers to cause a denial of service (infinite loop).","published":"2017-04-13T14:59:01.823Z","modified":"2026-08-07T11:45:48.936464858Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.netty:netty-handler","fixedVersion":"4.0.37.Final"},{"ecosystem":"Maven","name":"io.netty:netty-handler","fixedVersion":"4.1.1.Final"}],"fix":{"url":"https://github.com/netty/netty/pull/5364","label":"netty/netty#5364"},"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/afaa5860e3a6d327eb96c3d82cbd2f5996de815a16854ed1ad310144%40%3Ccommits.cassandra.apache.org%3E"},{"type":"ADVISORY","url":"http://netty.io/news/2016/06/07/4-0-37-Final.html"},{"type":"ADVISORY","url":"http://netty.io/news/2016/06/07/4-1-1-Final.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2017-0179.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2017-1097.html"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/96540"},{"type":"ADVISORY","url":"https://wiki.opendaylight.org/view/Security_Advisories"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1343616"},{"type":"FIX","url":"https://github.com/netty/netty/pull/5364"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:45:48.936464858Z"}}