Use After Free Affecting xorg-server package, versions <2:21.1.7-2


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.44% (35th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-XORGSERVER-5296037
  • published30 Mar 2023
  • disclosed30 Mar 2023

Introduced: 30 Mar 2023

CVE-2023-1393  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:unstable xorg-server to version 2:21.1.7-2 or higher.

NVD Description

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

A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.

References

CVSS Base Scores

version 3.1