<div class="container">
<h1>Recommended update for log4j</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-RU-2026:3381-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-07-28T15:35:47Z</td>
</tr>
<tr>
<th>Rating:</th>
<td>important</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">Basesystem Module 15-SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing LTSS 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing LTSS 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Real Time 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP4 LTSS</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP5 LTSS</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP6</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP6 LTSS</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP6</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP7</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that can now be installed.</p>
<h2>Description:</h2>
<p>This update for log4j fixes the following issues:</p>
<p>Upgrade to 2.26.1:</p>
<ul>
<li>
<p>Changed</p>
<ul>
<li>Improve logging for LinkageError scenarios involving the LMAX
Disruptor library</li>
</ul>
</li>
<li>
<p>Fixed</p>
<ul>
<li>Fix the createOnDemand behavior of RollingFileAppender to
correctly defer file and directory creation until the first
log event, while preserving eager creation when disabled</li>
<li>Improve documentation for locale handling in the Pattern
Layout date pattern converter</li>
<li>Fix handling of non-finite numbers while encoding MapMessage
to JSON</li>
<li>Fix encoding of MSGID and SD-ID fields of
StructuredDataMessage to XML</li>
<li>Fix stack trace rendering for exceptions with identity
malfunction (e.g., colliding equals() and/or hashCode()
implementations)</li>
<li>Fix resource leaks in ConfigurationSource when loading
configuration via URL fails</li>
<li>Fix KafkaAppender reporting error to error handler even after
a successful retry</li>
<li>Generate META-INF/services files using bnd-maven-plugin</li>
</ul>
</li>
</ul>
<h2>Patch Instructions:</h2>
<p>
To install this SUSE update use the SUSE recommended
installation methods like YaST online_update or "zypper patch".<br/>
Alternatively you can run the command listed for your product:
</p>
<ul class="list-group">
<li class="list-group-item">
SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server for SAP Applications 15 SP6
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 15 SP4 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server for SAP Applications 15 SP4
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 15 SP6 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-3381=1</code>
</li>
<li class="list-group-item">
Basesystem Module 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server for SAP Applications 15 SP5
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 15 SP5 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-3381=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-3381=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (noarch)
<ul>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 15 SP4 LTSS (noarch)
<ul>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server for SAP Applications 15 SP4 (noarch)
<ul>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (noarch)
<ul>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)
<ul>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
<ul>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
Basesystem Module 15-SP7 (noarch)
<ul>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 15 SP5 LTSS (noarch)
<ul>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server for SAP Applications 15 SP5 (noarch)
<ul>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (noarch)
<ul>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (noarch)
<ul>
<li>log4j-2.26.1-150200.4.39.1</li>
<li>log4j-jcl-2.26.1-150200.4.39.1</li>
<li>log4j-slf4j-2.26.1-150200.4.39.1</li>
<li>log4j-javadoc-2.26.1-150200.4.39.1</li>
</ul>
</li>
</ul>
</div>