{"id":"UBUNTU-CVE-2026-12611","details":"A client may issue HTTP/2 requests to a Jetty server that result in blocking writes that are never unblocked, eventually causing all threads to be blocked and the whole server to become unresponsive. This is caused by a race condition in the server when handling RST_STREAM frames and GOAWAY frames sent by the client. The race condition \"resets\" the HTTP2Flusher.terminated, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads.","modified":"2026-10-17T12:53:21.664878639Z","published":"2026-09-08T13:17:00Z","upstream":["CVE-2026-12611"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-12611"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-12611"},{"type":"REPORT","url":"https://github.com/jetty/jetty.project/security/advisories/GHSA-gpg9-4257-cfm3"}],"affected":[{"package":{"name":"jetty9","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/jetty9?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2.14-1"],"ecosystem_specific":{"binaries":[{"binary_version":"9.2.14-1","binary_name":"jetty9"},{"binary_version":"9.2.14-1","binary_name":"libjetty9-extra-java"},{"binary_name":"libjetty9-java","binary_version":"9.2.14-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12611.json"}},{"package":{"name":"jetty9","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/jetty9?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2.22-2","9.2.22-3","9.2.23-1","9.4.15-1~18.04.1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"jetty9","binary_version":"9.4.15-1~18.04.1ubuntu1"},{"binary_version":"9.4.15-1~18.04.1ubuntu1","binary_name":"libjetty9-extra-java"},{"binary_name":"libjetty9-java","binary_version":"9.4.15-1~18.04.1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12611.json"}},{"package":{"name":"jetty9","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/jetty9?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.4.18-2build2","9.4.26-1"],"ecosystem_specific":{"binaries":[{"binary_version":"9.4.26-1","binary_name":"jetty9"},{"binary_version":"9.4.26-1","binary_name":"libjetty9-extra-java"},{"binary_name":"libjetty9-java","binary_version":"9.4.26-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12611.json"}},{"package":{"name":"jetty9","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/jetty9?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.4.39-3","9.4.44-2","9.4.44-3","9.4.44-4","9.4.45-1"],"ecosystem_specific":{"binaries":[{"binary_name":"jetty9","binary_version":"9.4.45-1"},{"binary_version":"9.4.45-1","binary_name":"libjetty9-extra-java"},{"binary_name":"libjetty9-java","binary_version":"9.4.45-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12611.json"}},{"package":{"name":"jetty9","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/jetty9?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.4.51-2","9.4.53-1"],"ecosystem_specific":{"binaries":[{"binary_name":"jetty9","binary_version":"9.4.53-1"},{"binary_name":"libjetty9-extra-java","binary_version":"9.4.53-1"},{"binary_name":"libjetty9-java","binary_version":"9.4.53-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12611.json"}},{"package":{"name":"jetty12","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/jetty12?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12.0.32-1"],"ecosystem_specific":{"binaries":[{"binary_name":"jetty12","binary_version":"12.0.32-1"},{"binary_name":"libjetty12-extra-java","binary_version":"12.0.32-1"},{"binary_name":"libjetty12-java","binary_version":"12.0.32-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12611.json"}},{"package":{"name":"jetty9","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/jetty9?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.4.58-1","9.4.58-2"],"ecosystem_specific":{"binaries":[{"binary_name":"jetty9","binary_version":"9.4.58-2"},{"binary_name":"libjetty9-extra-java","binary_version":"9.4.58-2"},{"binary_name":"libjetty9-java","binary_version":"9.4.58-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12611.json"}},{"package":{"name":"jetty12","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/jetty12?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12.0.17-3.1","12.0.32-1"],"ecosystem_specific":{"binaries":[{"binary_name":"jetty12","binary_version":"12.0.32-1"},{"binary_name":"libjetty12-extra-java","binary_version":"12.0.32-1"},{"binary_name":"libjetty12-java","binary_version":"12.0.32-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/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