{"id":"CVE-2026-93515","title":".Org Server Present Extension Use-After-Free","summary":"A use-after-free in present_clear_window_notifies()  in the X.org X Server before 21.1.25 and X Wayland before 24.1.14 could be used by malicious X clients to crash or potentially execute code in the X server context.","severity":"medium","cvss":6.8,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-416"],"vendor":"X.org","product":"xorg-x11-server","affected":["xorg-x11-server < 21.1.25","xwayland < 24.1.14"],"published":"2026-10-28","updated":"2026-10-28","sourceUpdated":"2026-10-28T12:39:44.890Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93515","references":[{"url":"https://gitlab.freedesktop.org/xorg/xserver/-/commit/1b6955c3108e6b43433aefe860070708e6f43d1b"}],"tags":["cve.org"],"ingestedAt":"2026-10-28T13:11:23.675Z","slug":"CVE-2026-93515","body":"## Overview\n\nA use-after-free in present_clear_window_notifies()  in the X.org X Server before 21.1.25 and X Wayland before 24.1.14 could be used by malicious X clients to crash or potentially execute code in the X server context.\n\n## Affected\n\n- `xorg-x11-server < 21.1.25`\n- `xwayland < 24.1.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}