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Unscored USN-6587-4 0 CVEs

xorg-server, xwayland regression

Published Feb 1, 2024 · Updated Jun 25, 2026

Summary

USN-6587-1 fixed vulnerabilities in X.Org X Server. The fix was incomplete
resulting in a possible regression. This update fixes the problem.

Original advisory details:

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
memory when processing the DeviceFocusEvent and ProcXIQueryPointer APIs. An
attacker could possibly use this issue to cause the X Server to crash,
obtain sensitive information, or execute arbitrary code. (CVE-2023-6816)

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
reattaching to a different master device. An attacker could use this issue
to cause the X Server to crash, leading to a denial of service, or possibly
execute arbitrary code. (CVE-2024-0229)

Olivier Fourdan and Donn Seeley discovered that the X.Org X Server
incorrectly labeled GLX PBuffers when used with SELinux. An attacker could
use this issue to cause the X Server to crash, leading to a denial of
service. (CVE-2024-0408)

Olivier Fourdan discovered that the X.Org X Server incorrectly handled
the curser code when used with SELinux. An attacker could use this issue to
cause the X Server to crash, leading to a denial of service.
(CVE-2024-0409)

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
memory when processing the XISendDeviceHierarchyEvent API. An attacker
could possibly use this issue to cause the X Server to crash, or execute
arbitrary code. (CVE-2024-21885)

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
devices being disabled. An attacker could possibly use this issue to cause
the X Server to crash, or execute arbitrary code. (CVE-2024-21886)

Fixed packages 2

ReleasePackageFixed in
Ubuntu · Pro 16.04 LTS Pro:16.04:LTS xorg-server 2:1.18.4-0ubuntu0.12+esm10
Ubuntu · Pro 18.04 LTS Pro:18.04:LTS xorg-server 2:1.19.6-1ubuntu4.15+esm5

References

  • report
    https://launchpad.net/bugs/2051536