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Debian Security Advisory DSA-5380-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
March 29, 2023                        https://www.debian.org/security/faq
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Package        : xorg-server
CVE ID         : CVE-2023-1393

Jan-Niklas Sohn discovered that a user-after-free flaw in the Composite
extension of the X.org X server may result in privilege escalation if
the X server is running under the root user.

For the stable distribution (bullseye), this problem has been fixed in
version 2:1.20.11-1+deb11u6.

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/source-package/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/

Mailing list: debian-security-announce@lists.debian.org

Debian: DSA-5380-1: xorg-server security update

March 29, 2023
Jan-Niklas Sohn discovered that a user-after-free flaw in the Composite extension of the X.org X server may result in privilege escalation if the X server is running under the root...

Summary

For the stable distribution (bullseye), this problem has been fixed in
version 2:1.20.11-1+deb11u6.

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/source-package/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/

Mailing list: debian-security-announce@lists.debian.org

Severity
Jan-Niklas Sohn discovered that a user-after-free flaw in the Composite
extension of the X.org X server may result in privilege escalation if
the X server is running under the root user.

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