A xorg-server security update has been released for Debian GNU/Linux 10 to address an issue where missing input sanitising in X server extensions may result in local privilege escalation if the X server is configured to run with root privileges.

DSA 4758-1: xorg-server security update

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Debian Security Advisory DSA-4758-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
September 04, 2020   https://www.debian.org/security/faq
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Package : xorg-server
CVE ID : CVE-2020-14345 CVE-2020-14346 CVE-2020-14347 CVE-2020-14361
CVE-2020-14362
Debian Bug : 968986

Several vulnerabilities have been discovered in the X.Org X server.
Missing input sanitising in X server extensions may result in local
privilege escalation if the X server is configured to run with root
privileges. In addition an ASLR bypass was fixed.

For the stable distribution (buster), these problems have been fixed in
version 2:1.20.4-1+deb10u1.

We recommend that you upgrade your xorg-server packages.

For the detailed security status of xorg-server please refer to its
security tracker page at:
  https://security-tracker.debian.org/tracker/xorg-server

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/