{"id":"UBUNTU-CVE-2026-56684","details":"Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.","modified":"2026-09-17T13:30:04.734387571Z","published":"2026-08-18T15:16:00Z","related":["USN-8771-1"],"upstream":["CVE-2026-56684"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-56684"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-56684"},{"type":"REPORT","url":"https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh"},{"type":"REPORT","url":"https://github.com/valkey-io/valkey/pull/4234"},{"type":"REPORT","url":"https://github.com/valkey-io/valkey/commit/33b14adf2026cfd8728607b026edb24843805844"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8771-1"}],"affected":[{"package":{"name":"valkey","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/valkey?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.2.13+dfsg1-0ubuntu0.1+esm1"}]}],"versions":["7.2.5+dfsg1-2ubuntu4~24.04.1","7.2.7+dfsg1-0ubuntu0.24.04.1","7.2.8+dfsg1-0ubuntu0.24.04.1","7.2.8+dfsg1-0ubuntu0.24.04.2","7.2.8+dfsg1-0ubuntu0.24.04.3","7.2.10+dfsg1-0ubuntu0.1","7.2.11+dfsg1-0ubuntu0.1","7.2.11+dfsg1-0ubuntu0.2","7.2.12+dfsg1-0ubuntu0.1","7.2.13+dfsg1-0ubuntu0.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"valkey-redis-compat","binary_version":"7.2.13+dfsg1-0ubuntu0.1+esm1"},{"binary_name":"valkey-sentinel","binary_version":"7.2.13+dfsg1-0ubuntu0.1+esm1"},{"binary_name":"valkey-server","binary_version":"7.2.13+dfsg1-0ubuntu0.1+esm1"},{"binary_name":"valkey-tools","binary_version":"7.2.13+dfsg1-0ubuntu0.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56684.json"}},{"package":{"name":"valkey","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/valkey?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.4-0ubuntu0.2"}]}],"versions":["8.1.3+dfsg1-0ubuntu2","8.1.4+dfsg1-0ubuntu1","9.0.2-0ubuntu1","9.0.3-0ubuntu1","9.0.3-0ubuntu2","9.0.4-0ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"valkey-sentinel","binary_version":"9.0.4-0ubuntu0.2"},{"binary_version":"9.0.4-0ubuntu0.2","binary_name":"valkey-server"},{"binary_name":"valkey-tools","binary_version":"9.0.4-0ubuntu0.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56684.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}