{"id":"USN-8428-1","summary":"tmux vulnerability","details":"It was discovered that tmux incorrectly handled image cleanup, leading to\na use-after-free vulnerability. A local attacker could possibly use this\nissue to cause tmux to crash, resulting in a denial of service.","modified":"2026-06-15T20:29:18.966403245Z","published":"2026-06-15T13:03:51Z","related":["UBUNTU-CVE-2026-11623"],"upstream":["CVE-2026-11623","UBUNTU-CVE-2026-11623"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8428-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-11623"}],"affected":[{"package":{"name":"tmux","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tmux?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6a-2ubuntu0.1"}]}],"versions":["3.5a-3build1","3.6a-1","3.6a-2"],"ecosystem_specific":{"binaries":[{"binary_name":"tmux","binary_version":"3.6a-2ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8428-1.json","cves_map":{"cves":[{"id":"CVE-2026-11623","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","type":"CVSS_V4"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:26.04:LTS"}}}],"schema_version":"1.7.5"}