<div class="container">
<h1>Security update for libssh</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:22940-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-07-25T17:13:20Z</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=1272162">bsc#1272162</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272164">bsc#1272164</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272165">bsc#1272165</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272166">bsc#1272166</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272167">bsc#1272167</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272168">bsc#1272168</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272169">bsc#1272169</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272170">bsc#1272170</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272171">bsc#1272171</a>
</li>
<li style="display: inline;">
<a href="https://jira.suse.com/browse/PED-15815">jsc#PED-15815</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-2026-15370.html">CVE-2026-15370</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-59843.html">CVE-2026-59843</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-59844.html">CVE-2026-59844</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-59845.html">CVE-2026-59845</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-59846.html">CVE-2026-59846</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-59847.html">CVE-2026-59847</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-59848.html">CVE-2026-59848</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-59849.html">CVE-2026-59849</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-59850.html">CVE-2026-59850</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-2026-15370</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">5.4</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-15370</span>
<span class="cvss-source">
(
SUSE
):
</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>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-15370</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>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59843</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.1</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59843</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59843</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59844</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.1</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59844</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59844</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59845</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.2</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59845</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59845</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">5.3</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59846</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">2.4</span>
<span class="cvss-vector">CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59846</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">3.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59846</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">3.9</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59847</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.3</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59847</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59847</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">5.9</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59848</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.3</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59848</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">3.7</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59848</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:N/I:N/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59849</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">2.3</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59849</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">3.1</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59849</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">3.1</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59850</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">5.3</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59850</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">4.3</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-59850</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">4.3</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 nine vulnerabilities and contains one feature can now be installed.</p>
<h2>Description:</h2>
<p>This update for libssh fixes the following issues:</p>
<ul>
<li>CVE-2026-15370: stack buffer overflow in SFTP server longname construction (bsc#1272162).</li>
<li>CVE-2026-59843: denial of service via zero advertised channel packet size (bsc#1272164).</li>
<li>CVE-2026-59844: denial of service via oversized SFTP read length (bsc#1272165).</li>
<li>CVE-2026-59845: denial of service via unchecked ProxyCommand fork() failure (bsc#1272166).</li>
<li>CVE-2026-59846: information disclosure via ProxyCommand %r username expansion (bsc#1272167).</li>
<li>CVE-2026-59847: integrity downgrade via OpenSSL AES-GCM tag verification (bsc#1272168).</li>
<li>CVE-2026-59848: denial of service via SFTP responses with unknown request IDs (bsc#1272169).</li>
<li>CVE-2026-59849: denial of service via automatic certificate authentication loop (bsc#1272170).</li>
<li>CVE-2026-59850: use-after-free via data callbacks on closed channels (bsc#1272171).</li>
</ul>
<p>Changes for libssh:</p>
<ul>
<li>
<p>Update to 0.11.5:</p>
</li>
<li>
<p>Zero-initialize every ssh_string</p>
</li>
<li>Fix compatibility with C23 / gcc16</li>
<li>Fix multiple memory leaks, null checks, and error checks</li>
<li>Validate peer public key in DH key exchange</li>
<li>Avoid remote window overflow</li>
<li>Avoid off-by-one overflow during kbdint authentication</li>
<li>Avoid logging uninitialized sequence numbers</li>
<li>Avoid double conversion of SFTP version number</li>
<li>Send correct SFTP server version number</li>
<li>Avoid handling repeated SFTP INIT messages</li>
<li>
<p>Harmonize return values from SFTP server callbacks</p>
</li>
<li>
<p>Update %suse_version checks for SLES 16.x (jsc#PED-15815)</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-6.2-1349=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libssh4-debuginfo-0.11.5-160000.1.1</li>
<li>libssh4-0.11.5-160000.1.1</li>
<li>libssh-debugsource-0.11.5-160000.1.1</li>
</ul>
</li>
<li>
SUSE Linux Micro 6.2 (noarch)
<ul>
<li>libssh-config-0.11.5-160000.1.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-15370.html">https://www.suse.com/security/cve/CVE-2026-15370.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-59843.html">https://www.suse.com/security/cve/CVE-2026-59843.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-59844.html">https://www.suse.com/security/cve/CVE-2026-59844.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-59845.html">https://www.suse.com/security/cve/CVE-2026-59845.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-59846.html">https://www.suse.com/security/cve/CVE-2026-59846.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-59847.html">https://www.suse.com/security/cve/CVE-2026-59847.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-59848.html">https://www.suse.com/security/cve/CVE-2026-59848.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-59849.html">https://www.suse.com/security/cve/CVE-2026-59849.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-59850.html">https://www.suse.com/security/cve/CVE-2026-59850.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272162">https://bugzilla.suse.com/show_bug.cgi?id=1272162</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272164">https://bugzilla.suse.com/show_bug.cgi?id=1272164</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272165">https://bugzilla.suse.com/show_bug.cgi?id=1272165</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272166">https://bugzilla.suse.com/show_bug.cgi?id=1272166</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272167">https://bugzilla.suse.com/show_bug.cgi?id=1272167</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272168">https://bugzilla.suse.com/show_bug.cgi?id=1272168</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272169">https://bugzilla.suse.com/show_bug.cgi?id=1272169</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272170">https://bugzilla.suse.com/show_bug.cgi?id=1272170</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272171">https://bugzilla.suse.com/show_bug.cgi?id=1272171</a>
</li>
<li>
<a href="https://jira.suse.com/browse/PED-15815">https://jira.suse.com/browse/PED-15815</a>
</li>
</ul>
</div>