<div class="container">
<h1>Security update for systemd</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:0991-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-03-24T07:23:04Z</td>
</tr>
<tr>
<th>Rating:</th>
<td>important</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1259650">bsc#1259650</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1259697">bsc#1259697</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>
Cross-References:
</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-4105.html">CVE-2026-4105</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>CVSS scores:</th>
<td>
<ul class="list-group">
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-4105</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.3</span>
<span class="cvss-vector">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</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-4105</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.8</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-4105</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">6.7</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 12 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP5 LTSS</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 12 SP5</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves one vulnerability and has one security fix can now be installed.</p>
<h2>Description:</h2>
<p>This update for systemd fixes the following issue:</p>
<ul>
<li>CVE-2026-4105: privilege escalation due to improper access control in RegisterMachine D-Bus method (bsc#1259650).</li>
<li>udev: check for invalid chars in various fields received from the kernel (bsc#1259697). </li>
</ul>
<p>Changelog:</p>
<p>cbf8ee66ee machined: reject invalid class types when registering machines
1a55ad48da udev: fix review mixup
1eba76668c udev-builtin-net-id: print cescaped bad attributes
cbd4b55380 udev: ensure tag parsing stays within bounds
5973d3b1cc udev: ensure there is space for trailing NUL before calling sprintf
f038eb6c8b udev: check for invalid chars in various fields received from the kernel</p>
<h2>Special Instructions and Notes:</h2>
<ul>
<li>Please reboot the system after installing this update.</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 Server 12 SP5 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-991=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
<br/>
<code>zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-991=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
<ul>
<li>systemd-devel-228-157.75.1</li>
<li>udev-228-157.75.1</li>
<li>libudev-devel-228-157.75.1</li>
<li>udev-debuginfo-228-157.75.1</li>
<li>libudev1-debuginfo-228-157.75.1</li>
<li>systemd-sysvinit-228-157.75.1</li>
<li>libudev1-228-157.75.1</li>
<li>systemd-debugsource-228-157.75.1</li>
<li>libsystemd0-228-157.75.1</li>
<li>systemd-228-157.75.1</li>
<li>libsystemd0-debuginfo-228-157.75.1</li>
<li>systemd-debuginfo-228-157.75.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 12 SP5 LTSS (noarch)
<ul>
<li>systemd-bash-completion-228-157.75.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 12 SP5 LTSS (s390x x86_64)
<ul>
<li>libudev1-32bit-228-157.75.1</li>
<li>systemd-debuginfo-32bit-228-157.75.1</li>
<li>libsystemd0-debuginfo-32bit-228-157.75.1</li>
<li>systemd-32bit-228-157.75.1</li>
<li>libudev1-debuginfo-32bit-228-157.75.1</li>
<li>libsystemd0-32bit-228-157.75.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
<ul>
<li>systemd-devel-228-157.75.1</li>
<li>libudev1-32bit-228-157.75.1</li>
<li>udev-228-157.75.1</li>
<li>libudev-devel-228-157.75.1</li>
<li>udev-debuginfo-228-157.75.1</li>
<li>systemd-debuginfo-32bit-228-157.75.1</li>
<li>libudev1-debuginfo-228-157.75.1</li>
<li>systemd-sysvinit-228-157.75.1</li>
<li>systemd-32bit-228-157.75.1</li>
<li>libudev1-228-157.75.1</li>
<li>systemd-debugsource-228-157.75.1</li>
<li>libsystemd0-debuginfo-32bit-228-157.75.1</li>
<li>libsystemd0-228-157.75.1</li>
<li>systemd-228-157.75.1</li>
<li>libudev1-debuginfo-32bit-228-157.75.1</li>
<li>libsystemd0-debuginfo-228-157.75.1</li>
<li>systemd-debuginfo-228-157.75.1</li>
<li>libsystemd0-32bit-228-157.75.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (noarch)
<ul>
<li>systemd-bash-completion-228-157.75.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-4105.html">https://www.suse.com/security/cve/CVE-2026-4105.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1259650">https://bugzilla.suse.com/show_bug.cgi?id=1259650</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1259697">https://bugzilla.suse.com/show_bug.cgi?id=1259697</a>
</li>
</ul>
</div>