{"id":"UBUNTU-CVE-2026-86243","details":"Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected. Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.","modified":"2026-09-25T06:37:03.416016562Z","published":"2026-09-24T00:00:00Z","upstream":["CVE-2026-86243"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-86243"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-86243"},{"type":"REPORT","url":"https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/09/23/31"}],"affected":[{"package":{"name":"tomcat-native","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/tomcat-native?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.33-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.33-1","binary_name":"libtcnative-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86243.json"}},{"package":{"name":"tomcat-native","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tomcat-native?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.14-1","1.2.16-1","1.2.16-1build1","1.2.21-1~18.04.1","1.2.21-1~18.04.1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtcnative-1","binary_version":"1.2.21-1~18.04.1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86243.json"}},{"package":{"name":"tomcat-native","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tomcat-native?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.23-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.2.23-1","binary_name":"libtcnative-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86243.json"}},{"package":{"name":"tomcat-native","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/tomcat-native?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.26-1","1.2.31-1","1.2.31-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtcnative-1","binary_version":"1.2.31-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86243.json"}},{"package":{"name":"tomcat-native","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/tomcat-native?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.35-1","1.2.35-1build1","1.2.35-1build2","2.0.14-1~24.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.14-1~24.04.1","binary_name":"libtcnative-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86243.json"}},{"package":{"name":"tomcat-native","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tomcat-native?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-1","1.3.1-1build1","2.0.14-1~26.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtcnative-2","binary_version":"2.0.14-1~26.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86243.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}