Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 602
Alerts This Week
Warning Icon 1 602

openSUSE xorg-x11-server Important Heap Overflow Issues Fix 2026-2789-1

opensuse
Calendar Grey July 8, 2026
Dist Opensuse Esm H88
An important security advisory for openSUSE addressing two critical vulnerabilities in xorg-x11-server software with clear update instructions.
An update that solves two vulnerabilities can now be installed.

Description

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

* CVE-2026-55999: missing bounds check in `glamor_font_get` can lead to a heap

buffer overflow when a font loaded from a malicious PCF file is processed

(bsc#1268893).

* CVE-2026-56000: improper memory management in `CommonMakeCurrent` can lead

to a heap use-after-free when an interaction with a malicious client

creating GLX contexts happens (bsc#1268894).

Topics%20covered

Topics Covered

security advisory important heap overflow memory management Xorg X11 Server OpenSUSE

Patch

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like

YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4

zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-2789=1

* SUSE Linux Enterprise Server 15 SP4 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-2789=1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4

zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-2789=1

* openSUSE Leap 15.4

zypper in -t patch SUSE-2026-2789=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP4

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-2789=1

Package List

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64

x86_64)

* xorg-x11-server-extra-debuginfo-1.20.3-150400.38.74.1

* xorg-x11-server-1.20.3-150400.38.74.1

* xorg-x11-server-sdk-1.20.3-150400.38.74.1

* xorg-x11-server-debuginfo-1.20.3-150400.38.74.1

* xorg-x11-server-extra-1.20.3-150400.38.74.1

* xorg-x11-server-debugsource-1.20.3-150400.38.74.1

* openSUSE Leap 15.4 (aarch64 i586 ppc64le s390x x86_64)

* xorg-x11-server-source-1.20.3-150400.38.74.1

* xorg-x11-server-extra-debuginfo-1.20.3-150400.38.74.1

* xorg-x11-server-1.20.3-150400.38.74.1

* xorg-x11-server-sdk-1.20.3-150400.38.74.1

* xorg-x11-server-debuginfo-1.20.3-150400.38.74.1

* xorg-x11-server-extra-1.20.3-150400.38.74.1

* xorg-x11-server-debugsource-1.20.3-150400.38.74.1

* SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)

* xorg-x11-server-extra-debuginfo-1.20.3-150400.38.74.1

* xorg-x11-server-1.20.3-150400.38.74.1

* xorg-x11-server-sdk-1.20.3-150400.38.74.1

*...

Read the Full Advisory

References

* bsc#1268893

* bsc#1268894

## References:

* https://www.suse.com/security/cve/CVE-2026-55999.html

* https://www.suse.com/security/cve/CVE-2026-56000.html

* https://bugzilla.suse.com/show_bug.cgi?id=1268893

* https://bugzilla.suse.com/show_bug.cgi?id=1268894

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2789-1
Release Date: 2026-07-08T07:29:10Z
Affected Products: * openSUSE Leap 15.4 * SUSE Linux Enterprise High Performance Computing 15 SP4 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 * SUSE Linux Enterprise Server 15 SP4 * SUSE Linux Enterprise Server 15 SP4 LTSS * SUSE Linux Enterprise Server for SAP Applications 15 SP4

Topics%20covered

Topics Covered

security advisory important heap overflow memory management Xorg X11 Server OpenSUSE

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.