{"id":"CVE-2026-93524","title":"X.Org Server XKB SetMap Key Width/Action Count Desync Out-Of-Bounds Read","summary":"A buffer overread in CheckKeySyms() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to leak small amounts of information from X server memory or potentially crash the X server.","severity":"medium","cvss":6.9,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-126"],"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":"2026-10-28T16:24:52.508Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93524","references":[{"url":"https://gitlab.freedesktop.org/xorg/xserver/-/commit/cea71d0273e4d5092aa9c6a8a770734c8935c02e"}],"tags":["cve.org"],"ingestedAt":"2026-10-28T17:14:44.491Z","slug":"CVE-2026-93524","body":"## Overview\n\nA buffer overread in CheckKeySyms() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to leak small amounts of information from X server memory or potentially crash the X server.\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":38,"depthScoreParts":{"impact":38,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}