<div class="container">
<h1>Security update for dnsmasq</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:21640-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-05-13T16:33:13Z</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=1235517">bsc#1235517</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1235834">bsc#1235834</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1247812">bsc#1247812</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1257934">bsc#1257934</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1258251">bsc#1258251</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1262487">bsc#1262487</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265001">bsc#1265001</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265002">bsc#1265002</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265003">bsc#1265003</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265004">bsc#1265004</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265006">bsc#1265006</a>
</li>
<li style="display: inline;">
<a href="https://jira.suse.com/browse/PED-266">jsc#PED-266</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-2026-2291.html">CVE-2026-2291</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-4890.html">CVE-2026-4890</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-4891.html">CVE-2026-4891</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-4892.html">CVE-2026-4892</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-4893.html">CVE-2026-4893</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-5172.html">CVE-2026-5172</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-6507.html">CVE-2026-6507</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-2026-2291</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">9.2</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:H/AT:P/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-2026-2291</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.1</span>
<span class="cvss-vector">CVSS:3.1/AV:N/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-2026-2291</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.3</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-4890</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-4890</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-4891</span>
<span class="cvss-source">
(
SUSE
):
</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-2026-4891</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-2026-4892</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.4</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-4892</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">8.4</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-4893</span>
<span class="cvss-source">
(
SUSE
):
</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-2026-4893</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-2026-5172</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-5172</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.3</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-6507</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.7</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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-2026-6507</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-6507</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 6.2</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves seven vulnerabilities, contains one feature and has four fixes can now be installed.</p>
<h2>Description:</h2>
<p>This update for dnsmasq fixes the following issues</p>
<p>Security issues:</p>
<ul>
<li>CVE-2026-2291: dnsmasq can be abused to record false cached data enabling DoS or attacker redirect
(bsc#1258251).</li>
<li>CVE-2026-4890: DoS vulnerability in the DNSSEC validation (bsc#1265001).</li>
<li>CVE-2026-4891: heap-based out-of-bounds read vulnerability in the DNSSEC validation (bsc#1265002).</li>
<li>CVE-2026-4892: heap-based out-of-bounds write vulnerability in the DHCPv6 implementation (bsc#1265003).</li>
<li>CVE-2026-4893: information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks
(bsc#1265004).</li>
<li>CVE-2026-5172: buffer overflow in dnsmasq's extract_addresses() function (bsc#1265006).</li>
<li>CVE-2026-6507: out-of-bounds write in DHCP BOOTREPLY processing can lead to denial of service (bsc#1262487).</li>
</ul>
<p>Non security issues:</p>
<ul>
<li>aardvark-dns upstream tests make dnsmasq dump core (bsc#1247812).</li>
<li>Drop rcFOO symlinks for CODE16 (jsc#PED-266.</li>
<li>libnettle: update to 4.0 breaks dnsmasq and gnutls (bsc#1257934).</li>
<li>unknown user or group: dnsmasq with latest proposed dnsmasq update when doing virsh net-start (bsc#1235517).</li>
<li>Update to security release 2.92rel2.</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-6.2-742=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
<ul>
<li>dnsmasq-debuginfo-2.92rel2-160000.1.1</li>
<li>dnsmasq-2.92rel2-160000.1.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-2291.html">https://www.suse.com/security/cve/CVE-2026-2291.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-4890.html">https://www.suse.com/security/cve/CVE-2026-4890.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-4891.html">https://www.suse.com/security/cve/CVE-2026-4891.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-4892.html">https://www.suse.com/security/cve/CVE-2026-4892.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-4893.html">https://www.suse.com/security/cve/CVE-2026-4893.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-5172.html">https://www.suse.com/security/cve/CVE-2026-5172.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-6507.html">https://www.suse.com/security/cve/CVE-2026-6507.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1235517">https://bugzilla.suse.com/show_bug.cgi?id=1235517</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1235834">https://bugzilla.suse.com/show_bug.cgi?id=1235834</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1247812">https://bugzilla.suse.com/show_bug.cgi?id=1247812</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1257934">https://bugzilla.suse.com/show_bug.cgi?id=1257934</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1258251">https://bugzilla.suse.com/show_bug.cgi?id=1258251</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1262487">https://bugzilla.suse.com/show_bug.cgi?id=1262487</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265001">https://bugzilla.suse.com/show_bug.cgi?id=1265001</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265002">https://bugzilla.suse.com/show_bug.cgi?id=1265002</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265003">https://bugzilla.suse.com/show_bug.cgi?id=1265003</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265004">https://bugzilla.suse.com/show_bug.cgi?id=1265004</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1265006">https://bugzilla.suse.com/show_bug.cgi?id=1265006</a>
</li>
<li>
<a href="https://jira.suse.com/browse/PED-266">https://jira.suse.com/browse/PED-266</a>
</li>
</ul>
</div>