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

SUSE xorg-x11-server Important Heap Issues Vulnerability 2026-2789-1

suse
Calendar Grey July 8, 2026
Dist Suse Esm H88
Security update for SUSE fixing two important vulnerabilities in xorg-x11-server affecting system stability and security.
An update that solves two vulnerabilities can now be installed.

Summary

## 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). ## 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

Topics%20covered

Topics Covered

security advisory SuSE important heap overflow memory management Xorg X11 Server

References

* bsc#1268893

* bsc#1268894

Cross-

* CVE-2026-55999

* CVE-2026-56000

CVSS scores:

* CVE-2026-55999 ( SUSE ): 7.3

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2026-55999 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-55999 ( NVD ): 8.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

* CVE-2026-56000 ( SUSE ): 7.3

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2026-56000 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-56000 ( NVD ): 9.0

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected Products:

* openSUSE Leap 15.4

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2789-1
Release Date: 2026-07-08T07:29:10Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important heap overflow memory management Xorg X11 Server

Get the latest News and Insights

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