CVE-2022-4283: Debian Linux

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

A vulnerability was found in X.Org. This security flaw occurs because the XkbCopyNames function left a dangling pointer to freed memory, resulting in out-of-bounds memory access on subsequent XkbGetKbdByName requests.. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions.

Affected products

• Debian Debian Linux: version 11.0 only
• Fedoraproject Fedora: version 36 only; version 37 only
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only; version 9.0 only
• X.org X Server: version 1.20.4 only

Published 2022-12-14. Last modified 2026-06-17.