SUSE-RU-2026:3381-1: important: Recommended update for log4j

[SLE-UPDATES]

# Recommended update for log4j

Announcement ID: SUSE-RU-2026:3381-1  
Release Date: 2026-07-28T15:35:47Z  
Rating: important  
References:

  
Affected Products:

  * Basesystem Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise High Performance Computing 15 SP5
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP4 LTSS
  * SUSE Linux Enterprise Server 15 SP5
  * SUSE Linux Enterprise Server 15 SP5 LTSS
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP6 LTSS
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
An update that can now be installed.

## Description:

This update for log4j fixes the following issues:

Upgrade to 2.26.1:

  * Changed

    * Improve logging for LinkageError scenarios involving the LMAX Disruptor library
  * Fixed

    * Fix the createOnDemand behavior of RollingFileAppender to correctly defer file and directory creation until the first log event, while preserving eager creation when disabled
    * Improve documentation for locale handling in the Pattern Layout date pattern converter
    * Fix handling of non-finite numbers while encoding MapMessage to JSON
    * Fix encoding of MSGID and SD-ID fields of StructuredDataMessage to XML
    * Fix stack trace rendering for exceptions with identity malfunction (e.g., colliding equals() and/or hashCode() implementations)
    * Fix resource leaks in ConfigurationSource when loading configuration via URL fails
    * Fix KafkaAppender reporting error to error handler even after a successful retry
    * Generate META-INF/services files using bnd-maven-plugin

## 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 LTSS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-3381=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP6  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-3381=1

  * SUSE Linux Enterprise Server 15 SP4 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-3381=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-3381=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP4  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-3381=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-3381=1

  * SUSE Linux Enterprise Server 15 SP6 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-3381=1

  * Basesystem Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-3381=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP5  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-3381=1

  * SUSE Linux Enterprise Server 15 SP5 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-3381=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-3381=1

## Package List:

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (noarch)
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise Server 15 SP4 LTSS (noarch)
    * log4j-2.26.1-150200.4.39.1
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4 (noarch)
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (noarch)
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)
    * log4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-jcl-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * Basesystem Module 15-SP7 (noarch)
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise Server 15 SP5 LTSS (noarch)
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5 (noarch)
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (noarch)
    * log4j-2.26.1-150200.4.39.1
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (noarch)
    * log4j-2.26.1-150200.4.39.1
    * log4j-jcl-2.26.1-150200.4.39.1
    * log4j-slf4j-2.26.1-150200.4.39.1
    * log4j-javadoc-2.26.1-150200.4.39.1

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