SUSE-SU-2026:23601-1: important: Security update for LibVNCServer

[SLE-SECURITY-UPDATES]

# Security update for LibVNCServer

Announcement ID: SUSE-SU-2026:23601-1  
Release Date: 2026-09-02T09:34:17Z  
Rating: important  
References:

  * bsc#1276218

  
Cross-References:

  * CVE-2026-50538

  
CVSS scores:

  * CVE-2026-50538 ( SUSE ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-50538 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for LibVNCServer fixes the following issue:

  * CVE-2026-50538: malicious or MiTM VNC servers can force a connecting
    `libvncclient` to write attacker-controlled data past the end of a
    framebuffer, which can lead to a crash or arbitrary code execution
    (bsc#1276218).

## 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 Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1583

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-1583

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * libvncclient1-debuginfo-0.9.14-160000.6.1
    * libvncserver1-debuginfo-0.9.14-160000.6.1
    * libvncclient1-0.9.14-160000.6.1
    * libvncserver1-0.9.14-160000.6.1
    * LibVNCServer-debugsource-0.9.14-160000.6.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * libvncclient1-debuginfo-0.9.14-160000.6.1
    * libvncserver1-debuginfo-0.9.14-160000.6.1
    * libvncclient1-0.9.14-160000.6.1
    * libvncserver1-0.9.14-160000.6.1
    * LibVNCServer-debugsource-0.9.14-160000.6.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-50538.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1276218

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