CVE-2023-0494
HIGH7.8EPSS 0.71%xorg-server - security update
Published: 3/27/2023Modified: 4/28/2026
Description
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.
Affected packages (4)
- Debian/xorg-serverfrom 0, < 2:1.20.11-1+deb11u5
- Debian/xorg-serverfrom 0, < 2:1.20.4-1+deb10u8
- Debian/xorg-serverfrom 0, < 2:1.20.11-1+deb11u5
- Debian/xwaylandfrom 0, < 2:22.1.8-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |