{"id":"CVE-2023-0494","details":"A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.","modified":"2026-08-08T08:45:21.371815Z","published":"2023-03-27T00:00:00Z","related":["ALSA-2023:0622","ALSA-2023:0662","ALSA-2023:2248","ALSA-2023:2249","ALSA-2023:2805","ALSA-2023:2806","SUSE-SU-2023:0282-1","SUSE-SU-2023:0284-1","SUSE-SU-2023:0285-1","SUSE-SU-2023:0286-1","SUSE-SU-2023:0287-1","SUSE-SU-2023:0288-1","SUSE-SU-2023:0289-1","openSUSE-SU-2024:12664-1","openSUSE-SU-2024:12665-1"],"database_specific":{"cna_assigner":"redhat","cwe_ids":["CWE-416"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/0xxx/CVE-2023-0494.json"},"references":[{"type":"WEB","url":"https://lists.x.org/archives/xorg-announce/2023-February/003320.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/0xxx/CVE-2023-0494.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-0494"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202305-30"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2165995"},{"type":"FIX","url":"https://gitlab.freedesktop.org/xorg/xserver/-/commit/0ba6d8c37071131a49790243cdac55392ecf71ec"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.freedesktop.org/xorg/xserver","events":[{"introduced":"0"},{"fixed":"af9111ac7fa399a5a33fbfa145060e1850f41e0e"},{"introduced":"0d7ec5c7d9b451066a079fe56bcc9722341a91ff"},{"fixed":"0ba6d8c37071131a49790243cdac55392ecf71ec"}],"database_specific":{"cpe":["cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:7.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:7.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_workstation:7.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"fixed":"21.1.7"},{"introduced":"7.0"},{"last_affected":"7.0"}],"source":["CPE_RANGE","CPE_STRING","REFERENCES"]}}],"versions":["7.0","xorg-server 21.1.7","xorg-server-21.1.6","xorg-server-21.1.5","xorg-server-21.1.4","xorg-server-21.1.3","xorg-server-21.1.2","xorg-server-21.1.1","xorg-server-21.1.0","xorg-server-21.0.99.902","xorg-server-21.0.99.901","xorg-server-21.0.99.1","xorg-server-1.20.0","xorg-server-1.19.99.905","xorg-server-1.19.99.904","xorg-server-1.19.99.903","xorg-server-1.19.99.902","xorg-server-1.19.99.901","xorg-server-1.19.0","xorg-server-1.18.99.902","xorg-server-1.18.99.901","xorg-server-1.18.99.2","xorg-server-1.18.0","xorg-server-1.17.99.902","xorg-server-1.17.99.901","xorg-server-1.17.0","xorg-server-1.16.99.902","xorg-server-1.16.99.901","xorg-server-1.16.0","xorg-server-1.15.99.904","xorg-server-1.15.99.903","xorg-server-1.15.99.902","xorg-server-1.15.99.901","xorg-server-1.15.0","xorg-server-1.14.99.905","xorg-server-1.14.99.904","xorg-server-1.14.99.903","xorg-server-1.14.99.902","xorg-server-1.14.99.901","xorg-server-1.14.99.3","xorg-server-1.14.99.2","xorg-server-1.14.99.1","xorg-server-1.14.0","xorg-server-1.13.99.902","xorg-server-1.13.99.901","xorg-server-1.13.0","xorg-server-1.12.99.905","xorg-server-1.12.99.904","xorg-server-1.12.99.903","xorg-server-1.12.99.902","xorg-server-1.12.99.901","xorg-server-1.12.0","xorg-server-1.11.99.903","xorg-server-1.11.99.902","xorg-server-1.11.99.901","xorg-server-1.11.99.1","xorg-server-1.11.0","xorg-server-1.10.99.902","xorg-server-1.10.99.901","xorg-server-1.10.0","xorg-server-1.9.99.903","xorg-server-1.9.99.902","xorg-server-1.9.99.901","xorg-server-1.9.0","xorg-server-1.8.99.906","xorg-server-1.8.99.905","xorg-server-1.8.99.904","xorg-server-1.8.99.903","xorg-server-1.8.99.902","xorg-server-1.8.99.901","xorg-server-1.8.0","xorg-server-1.7.99.902","xorg-server-1.7.99.901","xorg-server-1.7.99.2","xorg-server-1.7.99.1","xorg-server-1.6.99.901","xorg-server-1.6.99.900","xorg-server-1.5.99.1","xorg-server-1.1.99.3","xorg-server-1_1_99_2","xorg-server-1_0_99_901","XORG-7_0_99_901","xorg-server-1_1_99_1","xorg-server-1_0_99_2","xorg-server-1_0_99_1","XORG-7_0","pre-xgldrop-merge"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-0494.json","vanir_signatures_modified":"2026-08-08T08:45:21Z","vanir_signatures":[{"id":"CVE-2023-0494-3a331a16","signature_type":"Line","signature_version":"v1","source":"https://gitlab.freedesktop.org/xorg/xserver@0ba6d8c37071131a49790243cdac55392ecf71ec","target":{"file":"Xi/exevents.c"},"deprecated":false,"digest":{"line_hashes":["74106098508242225049021527155819159703","95056552086437722391515703312333258183","263086816622054653013670691820743023688","187621220841141749469078690120853429229","48794798834028557475176690849393643529"],"threshold":0.9}},{"digest":{"function_hash":"139982773311384739155271790805276520930","length":4327},"id":"CVE-2023-0494-7e05971b","signature_type":"Function","signature_version":"v1","source":"https://gitlab.freedesktop.org/xorg/xserver@0ba6d8c37071131a49790243cdac55392ecf71ec","target":{"file":"Xi/exevents.c","function":"DeepCopyPointerClasses"},"deprecated":false}]}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}