Use After Free Affecting xwayland package, versions <2:22.1.8-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.9% (55th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-XWAYLAND-3314619
  • published7 Feb 2023
  • disclosed27 Mar 2023

Introduced: 7 Feb 2023

CVE-2023-0494  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:unstable xwayland to version 2:22.1.8-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xwayland package and not the xwayland package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1