<div class="container">
<h1>Recommended update for shim</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-RU-2026:20004-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2025-12-30T16:21:01Z</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=1205588">bsc#1205588</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1247432">bsc#1247432</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1254336">bsc#1254336</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1254679">bsc#1254679</a>
</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 has four fixes can now be installed.</p>
<h2>Description:</h2>
<p>This update for shim fixes the following issues:</p>
<p>This update for shim fixes the following issues:</p>
<p>shim is updated to version 16.1:</p>
<ul>
<li>shim_start_image(): fix guid/handle pairing when uninstalling protocols</li>
<li>Fix uncompressed ipv6 netboot</li>
<li>fix test segfaults caused by uninitialized memory</li>
<li>SbatLevel_Variable.txt: minor typo fix.</li>
<li>Realloc() needs to allocate one more byte for sprintf()</li>
<li>IPv6: Add more check to avoid multiple double colon and illegal char</li>
<li>Loader proto v2</li>
<li>loader-protocol: add workaround for EDK2 2025.02 page fault on FreePages</li>
<li>Generate Authenticode for the entire PE file</li>
<li>README: mention new loader protocol and interaction with UKIs</li>
<li>shim: change automatically enable MOK_POLICY_REQUIRE_NX</li>
<li>Save var info</li>
<li>add SbatLevel entry 2025051000 for PSA-2025-00012-1</li>
<li>Coverity fixes 20250804</li>
<li>fix http boot</li>
<li>Fix double free and leak in the loader protocol</li>
</ul>
<p>shim is updated to version 16.0:</p>
<ul>
<li>Validate that a supplied vendor cert is not in PEM format</li>
<li>sbat: Add grub.peimage,2 to latest (CVE-2024-2312)</li>
<li>sbat: Also bump latest for grub,4 (and to todays date)</li>
<li>undo change that limits certificate files to a single file</li>
<li>shim: don't set second_stage to the empty string</li>
<li>Fix SBAT.md for today's consensus about numbers</li>
<li>Update Code of Conduct contact address</li>
<li>make-certs: Handle missing OpenSSL installation</li>
<li>Update MokVars.txt</li>
<li>export DEFINES for sub makefile</li>
<li>Drop unused EFI_IMAGE_SECURITY_DATABASE_GUID definition</li>
<li>Null-terminate 'arguments' in fallback</li>
<li>Fix "Verifiying" typo in error message</li>
<li>Update Fedora CI targets</li>
<li>Force gcc to produce DWARF4 so that gdb can use it</li>
<li>Minor housekeeping 2024121700</li>
<li>Discard load-options that start with WINDOWS</li>
<li>Fix the issue that the gBS->LoadImage pointer was empty.</li>
<li>shim: Allow data after the end of device path node in load options</li>
<li>Handle network file not found like disks</li>
<li>Update gnu-efi submodule for EFI_HTTP_ERROR</li>
<li>Increase EFI file alignment</li>
<li>avoid EFIv2 runtime services on Apple x86 machines</li>
<li>Improve shortcut performance when comparing two boolean expressions</li>
<li>Provide better error message when MokManager is not found</li>
<li>tpm: Boot with a warning if the event log is full</li>
<li>MokManager: remove redundant logical constraints</li>
<li>Test import_mok_state() when MokListRT would be bigger than available size</li>
<li>test-mok-mirror: minor bug fix</li>
<li>Fix file system browser hang when enrolling MOK from disk</li>
<li>Ignore a minor clang-tidy nit</li>
<li>Allow fallback to default loader when encountering errors on network boot</li>
<li>test.mk: don't use a temporary random.bin</li>
<li>pe: Enhance debug report for update_mem_attrs</li>
<li>Multiple certificate handling improvements</li>
<li>Generate SbatLevel Metadata from SbatLevel_Variable.txt</li>
<li>Apply EKU check with compile option</li>
<li>Add configuration option to boot an alternative 2nd stage</li>
<li>Loader protocol (with Device Path resolution support)</li>
<li>netboot cleanup for additional files</li>
<li>Document how revocations can be delivered</li>
<li>post-process-pe: add tests to validate NX compliance</li>
<li>regression: CopyMem() in ad8692e copies out of bounds</li>
<li>Save the debug and error logs in mok-variables</li>
<li>Add features for the Host Security ID program</li>
<li>Mirror some more efi variables to mok-variables</li>
<li>This adds DXE Services measurements to HSI and uses them for NX</li>
<li>Add shim's current NX_COMPAT status to HSIStatus</li>
<li>README.tpm: reflect that vendor_db is in fact logged as "vendor_db"</li>
<li>Reject HTTP message with duplicate Content-Length header fields</li>
<li>Disable log saving</li>
<li>fallback: don't add new boot order entries backwards</li>
<li>README.tpm: Update MokList entry to MokListRT</li>
<li>SBAT Level update for February 2025 GRUB CVEs</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-6.0-541=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Micro 6.0 (aarch64 x86_64)
<ul>
<li>shim-16.1-1.1</li>
<li>shim-debuginfo-16.1-1.1</li>
<li>shim-debugsource-16.1-1.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1205588">https://bugzilla.suse.com/show_bug.cgi?id=1205588</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1247432">https://bugzilla.suse.com/show_bug.cgi?id=1247432</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1254336">https://bugzilla.suse.com/show_bug.cgi?id=1254336</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1254679">https://bugzilla.suse.com/show_bug.cgi?id=1254679</a>
</li>
</ul>
</div>