<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-2025:21223-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2025-12-15T12:50:52Z</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=1234959">bsc#1234959</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1245636">bsc#1245636</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1245738">bsc#1245738</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1245953">bsc#1245953</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1246231">bsc#1246231</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1247242">bsc#1247242</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1249088">bsc#1249088</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1249385">bsc#1249385</a>
</li>
<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-2024-56738.html">CVE-2024-56738</a>
</li>
<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-2024-56738</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">5.7</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2024-56738</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.7</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2024-56738</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">5.3</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A: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">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 6.2</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves seven vulnerabilities and has seven fixes can now be installed.</p>
<h2>Description:</h2>
<p>This update for grub2 fixes the following issues:</p>
<p>Changes in grub2:</p>
<ul>
<li>CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)</li>
<li>CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)</li>
<li>CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)</li>
<li>CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)</li>
<li>CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)</li>
<li>
<p>CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)</p>
</li>
<li>
<p>Bump upstream SBAT generation to 6</p>
</li>
<li>
<p>Fix "sparse file not allowed" error after grub2-reboot (bsc#1245738)</p>
</li>
<li>Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)</li>
<li>turn off page flipping for i386-pc using VBE video backend (bsc#1245636)</li>
<li>Fix boot hangs in setting up serial console when ACPI SPCR table is present
and redirection is disabled (bsc#1249088)</li>
<li>Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)</li>
<li>
<p>Skip mount point in grub_find_device function (bsc#1246231)</p>
</li>
<li>
<p>CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959)</p>
</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 6.2
<br/>
<code>zypper in -t patch SUSE-SL-Micro-6.2-106=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
<ul>
<li>grub2-common-debuginfo-2.12-160000.3.1</li>
<li>grub2-2.12-160000.3.1</li>
<li>grub2-common-2.12-160000.3.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.2 (aarch64 s390x x86_64)
<ul>
<li>grub2-debugsource-2.12-160000.3.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.2 (noarch)
<ul>
<li>grub2-x86_64-xen-2.12-160000.3.1</li>
<li>grub2-x86_64-efi-2.12-160000.3.1</li>
<li>grub2-arm64-efi-2.12-160000.3.1</li>
<li>grub2-snapper-plugin-2.12-160000.3.1</li>
<li>grub2-powerpc-ieee1275-2.12-160000.3.1</li>
<li>grub2-i386-pc-2.12-160000.3.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.2 (s390x)
<ul>
<li>grub2-s390x-emu-2.12-160000.3.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2024-56738.html">https://www.suse.com/security/cve/CVE-2024-56738.html</a>
</li>
<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=1234959">https://bugzilla.suse.com/show_bug.cgi?id=1234959</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1245636">https://bugzilla.suse.com/show_bug.cgi?id=1245636</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1245738">https://bugzilla.suse.com/show_bug.cgi?id=1245738</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1245953">https://bugzilla.suse.com/show_bug.cgi?id=1245953</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1246231">https://bugzilla.suse.com/show_bug.cgi?id=1246231</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1247242">https://bugzilla.suse.com/show_bug.cgi?id=1247242</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1249088">https://bugzilla.suse.com/show_bug.cgi?id=1249088</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1249385">https://bugzilla.suse.com/show_bug.cgi?id=1249385</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>