<div class="container">
<h1>Security update for grub2</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2025:21062-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2025-11-21T13:08:21Z</td>
</tr>
<tr>
<th>Rating:</th>
<td>moderate</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252930">bsc#1252930</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252931">bsc#1252931</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252932">bsc#1252932</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252933">bsc#1252933</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252934">bsc#1252934</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252935">bsc#1252935</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-2025-54770.html">CVE-2025-54770</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2025-54771.html">CVE-2025-54771</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2025-61661.html">CVE-2025-61661</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2025-61662.html">CVE-2025-61662</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2025-61663.html">CVE-2025-61663</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2025-61664.html">CVE-2025-61664</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-2025-54770</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">2.1</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-54770</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-54770</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-54771</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">2.1</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-54771</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-54771</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61661</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.3</span>
<span class="cvss-vector">CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61661</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.8</span>
<span class="cvss-vector">CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61661</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">4.8</span>
<span class="cvss-vector">CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61662</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">2.1</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61662</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61662</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61663</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">2.1</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61663</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61663</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61664</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">2.1</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61664</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2025-61664</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">4.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">SUSE Linux Micro 6.1</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves six vulnerabilities can now be installed.</p>
<h2>Description:</h2>
<p>This update for grub2 fixes the following issues:</p>
<ul>
<li>CVE-2025-54770: Missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)</li>
<li>CVE-2025-54771: grub_file_close() does not properly controls the fs refcount (bsc#1252931)</li>
<li>CVE-2025-61661: Out-of-bounds write in grub_usb_get_string() function (bsc#1252932)</li>
<li>CVE-2025-61662: Missing unregister call for gettext command may lead to use-after-free (bsc#1252933)</li>
<li>CVE-2025-61663: Missing unregister call for normal commands may lead to use-after-free (bsc#1252934)</li>
<li>CVE-2025-61664: Missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)</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 6.1
<br/>
<code>zypper in -t patch SUSE-SLE-Micro-6.1-341=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64)
<ul>
<li>grub2-2.12-slfo.1.1_3.1</li>
<li>grub2-debuginfo-2.12-slfo.1.1_3.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.1 (noarch)
<ul>
<li>grub2-x86_64-xen-2.12-slfo.1.1_3.1</li>
<li>grub2-x86_64-efi-2.12-slfo.1.1_3.1</li>
<li>grub2-arm64-efi-2.12-slfo.1.1_3.1</li>
<li>grub2-i386-pc-2.12-slfo.1.1_3.1</li>
<li>grub2-powerpc-ieee1275-2.12-slfo.1.1_3.1</li>
<li>grub2-snapper-plugin-2.12-slfo.1.1_3.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.1 (aarch64 s390x x86_64)
<ul>
<li>grub2-debugsource-2.12-slfo.1.1_3.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.1 (s390x)
<ul>
<li>grub2-s390x-emu-2.12-slfo.1.1_3.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2025-54770.html">https://www.suse.com/security/cve/CVE-2025-54770.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2025-54771.html">https://www.suse.com/security/cve/CVE-2025-54771.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2025-61661.html">https://www.suse.com/security/cve/CVE-2025-61661.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2025-61662.html">https://www.suse.com/security/cve/CVE-2025-61662.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2025-61663.html">https://www.suse.com/security/cve/CVE-2025-61663.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2025-61664.html">https://www.suse.com/security/cve/CVE-2025-61664.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252930">https://bugzilla.suse.com/show_bug.cgi?id=1252930</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252931">https://bugzilla.suse.com/show_bug.cgi?id=1252931</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252932">https://bugzilla.suse.com/show_bug.cgi?id=1252932</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252933">https://bugzilla.suse.com/show_bug.cgi?id=1252933</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252934">https://bugzilla.suse.com/show_bug.cgi?id=1252934</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1252935">https://bugzilla.suse.com/show_bug.cgi?id=1252935</a>
</li>
</ul>
</div>