{"id":"UBUNTU-CVE-2019-8955","details":"In Tor before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha, remote denial of service against Tor clients and relays can occur via memory exhaustion in the KIST cell scheduler.","modified":"2026-01-30T01:41:27.238927Z","published":"2019-02-21T23:29:00Z","related":["USN-5036-1"],"upstream":["CVE-2019-8955"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-8955"},{"type":"REPORT","url":"https://blog.torproject.org/new-releases-tor-0402-alpha-0358-03411-and-03312"},{"type":"REPORT","url":"https://trac.torproject.org/projects/tor/ticket/29168"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5036-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-8955"}],"affected":[{"package":{"name":"tor","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/tor@0.3.2.10-1ubuntu0.2~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.2.10-1ubuntu0.2~esm1"}]}],"versions":["0.3.0.10-1","0.3.1.8-2","0.3.1.9-1","0.3.2.9-1","0.3.2.9-1build1","0.3.2.10-1","0.3.2.10-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"tor","binary_version":"0.3.2.10-1ubuntu0.2~esm1"},{"binary_name":"tor-geoipdb","binary_version":"0.3.2.10-1ubuntu0.2~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-8955.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}