{"id":"UBUNTU-CVE-2018-25021","details":"The TCP Server module in toxcore before 0.2.8 doesn't free the TCP priority queue under certain conditions, which allows a remote attacker to exhaust the system's memory, causing a denial of service (DoS).","modified":"2025-07-16T07:38:33.285401Z","published":"2021-12-13T01:15:00Z","withdrawn":"2025-07-18T16:44:52Z","upstream":["CVE-2018-25021"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-25021"},{"type":"REPORT","url":"https://blog.tox.chat/2018/10/memory-leak-bug-and-new-toxcore-release-fixing-it/"},{"type":"REPORT","url":"https://github.com/TokTok/c-toxcore/issues/1214"},{"type":"REPORT","url":"https://github.com/TokTok/c-toxcore/pull/1216"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-25021"}],"affected":[{"package":{"name":"libtoxcore","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libtoxcore@0.2.10-1build2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.10-1build2"}]}],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.2.10-1build2","binary_name":"libtoxcore-dev"},{"binary_name":"libtoxcore2","binary_version":"0.2.10-1build2"},{"binary_version":"0.2.10-1build2","binary_name":"libtoxcore2-dbgsym"},{"binary_name":"toxcore-utils","binary_version":"0.2.10-1build2"},{"binary_name":"toxcore-utils-dbgsym","binary_version":"0.2.10-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-25021.json"}}],"schema_version":"1.7.3","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"}]}