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openSUSE 16.0 xorg-x11-server Important Security Update 2026-20544-1

opensuse
Calendar Grey April 21, 2026
Dist Opensuse Esm H88
openSUSE update for xorg-x11-server addresses 5 issues enhancing system security and stability.
An update that solves 5 vulnerabilities and has 5 bug fixes can now be installed.

Description

This update for xorg-x11-server fixes the following issues:

- CVE-2026-33999: XKB Integer Underflow in XkbSetCompatMap() (bsc#1260922).

- CVE-2026-34000: XKB Out-of-bounds Read in CheckSetGeom() (bsc#1260923).

- CVE-2026-34001: XSYNC Use-after-free in miSyncTriggerFence() (bsc#1260924).

- CVE-2026-34002: XKB Out-of-bounds read in CheckModifierMap() (bsc#1260925).

- CVE-2026-34003: XKB Buffer overflow in CheckKeyTypes() (bsc#1260926).

Patch instructions:

To install this openSUSE security update use the suse recommended installation methods

like YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

zypper in -t patch openSUSE-Leap-16.0-567=1

Topics%20covered

Topics Covered

security advisory buffer overflow important Xorg X11 Server OpenSUSE xkb

Patch

Package List

- openSUSE Leap 16.0:

xorg-x11-server-21.1.15-160000.4.1

xorg-x11-server-Xvfb-21.1.15-160000.4.1

xorg-x11-server-extra-21.1.15-160000.4.1

xorg-x11-server-sdk-21.1.15-160000.4.1

xorg-x11-server-source-21.1.15-160000.4.1

xorg-x11-server-wrapper-21.1.15-160000.4.1

References

* bsc#1260922

* bsc#1260923

* bsc#1260924

* bsc#1260925

* bsc#1260926

References:

* https://www.suse.com/security/cve/CVE-2026-33999.html

* https://www.suse.com/security/cve/CVE-2026-34000.html

* https://www.suse.com/security/cve/CVE-2026-34001.html

* https://www.suse.com/security/cve/CVE-2026-34002.html

* https://www.suse.com/security/cve/CVE-2026-34003.html

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2026:20544-1
Rating: important
Affected Products: openSUSE Leap 16.0 -------------------------------------------------------------

Topics%20covered

Topics Covered

security advisory buffer overflow important Xorg X11 Server OpenSUSE xkb

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