<div class="container">
<h1>Security update for the Linux Kernel</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:21684-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-05-15T15:50:45Z</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=1264013">bsc#1264013</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1264450">bsc#1264450</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265209">bsc#1265209</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-2025-54518.html">CVE-2025-54518</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-43500.html">CVE-2026-43500</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-46300.html">CVE-2026-46300</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-2025-54518</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.3</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:H/AT:N/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-2025-54518</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.4</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-54518</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.3</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-43500</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.8</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-43500</span>
<span class="cvss-source">
(
NVD
):
</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-2026-43500</span>
<span class="cvss-source">
(
NVD
):
</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-2026-46300</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.6</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:L/AT:N/PR:N/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-2026-46300</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.8</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 Micro 6.0</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves three vulnerabilities can now be installed.</p>
<h2>Description:</h2>
<p>The SUSE Linux Enterprise Micro 6.0 and Micro 6.1 RT kernel was updated to fix various security issues</p>
<p>The following security issues were fixed:</p>
<ul>
<li>CVE-2025-54518: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache (bsc#1264013).</li>
<li>CVE-2026-46300: net: skbuff: propagate shared-frag marker through pskb_copy() (bsc#1265209).</li>
<li>CVE-2026-43500: rxrpc: unshare DATA/RESPONSE packets when paged frags are present (bsc#1264450).</li>
</ul>
<p>The following non security issues were fixed:</p>
<ul>
<li>config: s390x/ppc64le: disable unsupported CONFIG_AFS_FS and CONFIG_AF_RXRPC (bsc#1264450).</li>
<li>io-wq: check that the predecessor is hashed in io_wq_remove_pending() (git-fixes).</li>
</ul>
<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 Micro 6.0
<br/>
<code>zypper in -t patch SUSE-SLE-Micro-6.0-kernel-427=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Micro 6.0 (noarch)
<ul>
<li>kernel-source-rt-6.4.0-45.1</li>
<li>kernel-devel-rt-6.4.0-45.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.0 (nosrc x86_64)
<ul>
<li>kernel-rt-6.4.0-45.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.0 (x86_64)
<ul>
<li>kernel-rt-debugsource-6.4.0-45.1</li>
<li>kernel-rt-livepatch-6.4.0-45.1</li>
<li>kernel-rt-debuginfo-6.4.0-45.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2025-54518.html">https://www.suse.com/security/cve/CVE-2025-54518.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-43500.html">https://www.suse.com/security/cve/CVE-2026-43500.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-46300.html">https://www.suse.com/security/cve/CVE-2026-46300.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1264013">https://bugzilla.suse.com/show_bug.cgi?id=1264013</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1264450">https://bugzilla.suse.com/show_bug.cgi?id=1264450</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265209">https://bugzilla.suse.com/show_bug.cgi?id=1265209</a>
</li>
</ul>
</div>