<div class="container">
<h1>Security update for corosync</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:4202-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-09-16T08:18:20Z</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=1278738">bsc#1278738</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1278739">bsc#1278739</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-2026-81665.html">CVE-2026-81665</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-81666.html">CVE-2026-81666</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-2026-81665</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.7</span>
<span class="cvss-vector">CVSS:4.0/AV:A/AC:L/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-2026-81665</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:A/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-2026-81665</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:A/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-2026-81666</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.1</span>
<span class="cvss-vector">CVSS:4.0/AV:A/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-2026-81666</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:A/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-2026-81666</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:A/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">openSUSE Leap 15.3</li>
<li class="list-group-item">SUSE Linux Enterprise High Availability Extension 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Availability Extension 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise High Availability Extension 15 SP6</li>
<li class="list-group-item">SUSE Linux Enterprise High Availability Extension 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP6</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP6</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP7</li>
<li class="list-group-item">SUSE Manager Proxy 4.3</li>
<li class="list-group-item">SUSE Manager Retail Branch Server 4.3</li>
<li class="list-group-item">SUSE Manager Server 4.3</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves two vulnerabilities can now be installed.</p>
<h2>Description:</h2>
<p>This update for corosync fixes the following issues:</p>
<ul>
<li>CVE-2026-81665: heap-based buffer overflow in totempg assembly buffer during fragmented message reassembly
(bsc#1278738).</li>
<li>CVE-2026-81666: integer overflow in check_memb_commit_token_sanity may bypass message length validation on 32-bit
systems (bsc#1278739).</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">
openSUSE Leap 15.3
<br/>
<code>zypper in -t patch SUSE-2026-4202</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Availability Extension 15 SP4
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HA-15-SP4-2026-4202</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Availability Extension 15 SP5
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HA-15-SP5-2026-4202</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Availability Extension 15 SP6
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HA-15-SP6-2026-4202</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Availability Extension 15 SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HA-15-SP7-2026-4202</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
openSUSE Leap 15.3 (aarch64 i586 ppc64le s390x x86_64)
<ul>
<li>libquorum5-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-2.4.6-150300.12.19.1</li>
<li>corosync-debugsource-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcpg4-2.4.6-150300.12.19.1</li>
<li>corosync-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-debuginfo-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync-devel-2.4.6-150300.12.19.1</li>
<li>libcpg4-debuginfo-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-2.4.6-150300.12.19.1</li>
<li>corosync-2.4.6-150300.12.19.1</li>
<li>libsam4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-2.4.6-150300.12.19.1</li>
<li>libsam4-2.4.6-150300.12.19.1</li>
<li>libquorum5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-2.4.6-150300.12.19.1</li>
</ul>
</li>
<li>
openSUSE Leap 15.3 (x86_64)
<ul>
<li>libsam4-32bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-32bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-32bit-2.4.6-150300.12.19.1</li>
<li>libcmap4-32bit-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-32bit-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-32bit-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-32bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-32bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcpg4-32bit-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-32bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcpg4-32bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libquorum5-32bit-2.4.6-150300.12.19.1</li>
<li>libcfg6-32bit-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-32bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libquorum5-32bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libsam4-32bit-2.4.6-150300.12.19.1</li>
</ul>
</li>
<li>
openSUSE Leap 15.3 (aarch64_ilp32)
<ul>
<li>libcorosync_common4-64bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libquorum5-64bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-64bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-64bit-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-64bit-2.4.6-150300.12.19.1</li>
<li>libcmap4-64bit-2.4.6-150300.12.19.1</li>
<li>libcfg6-64bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcpg4-64bit-2.4.6-150300.12.19.1</li>
<li>libquorum5-64bit-2.4.6-150300.12.19.1</li>
<li>libsam4-64bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-64bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-64bit-2.4.6-150300.12.19.1</li>
<li>libcpg4-64bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libsam4-64bit-2.4.6-150300.12.19.1</li>
<li>libcmap4-64bit-debuginfo-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-64bit-2.4.6-150300.12.19.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Availability Extension 15 SP4 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libquorum5-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-2.4.6-150300.12.19.1</li>
<li>corosync-debugsource-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcpg4-2.4.6-150300.12.19.1</li>
<li>corosync-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-debuginfo-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync-devel-2.4.6-150300.12.19.1</li>
<li>libcpg4-debuginfo-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-2.4.6-150300.12.19.1</li>
<li>corosync-2.4.6-150300.12.19.1</li>
<li>libsam4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-2.4.6-150300.12.19.1</li>
<li>libsam4-2.4.6-150300.12.19.1</li>
<li>libquorum5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-2.4.6-150300.12.19.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Availability Extension 15 SP5 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libquorum5-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-2.4.6-150300.12.19.1</li>
<li>corosync-debugsource-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcpg4-2.4.6-150300.12.19.1</li>
<li>corosync-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-debuginfo-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync-devel-2.4.6-150300.12.19.1</li>
<li>libcpg4-debuginfo-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-2.4.6-150300.12.19.1</li>
<li>corosync-2.4.6-150300.12.19.1</li>
<li>libsam4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-2.4.6-150300.12.19.1</li>
<li>libsam4-2.4.6-150300.12.19.1</li>
<li>libquorum5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-2.4.6-150300.12.19.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Availability Extension 15 SP6 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libquorum5-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-2.4.6-150300.12.19.1</li>
<li>corosync-debugsource-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcpg4-2.4.6-150300.12.19.1</li>
<li>corosync-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-debuginfo-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync-devel-2.4.6-150300.12.19.1</li>
<li>libcpg4-debuginfo-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-2.4.6-150300.12.19.1</li>
<li>corosync-2.4.6-150300.12.19.1</li>
<li>libsam4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-2.4.6-150300.12.19.1</li>
<li>libsam4-2.4.6-150300.12.19.1</li>
<li>libquorum5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-2.4.6-150300.12.19.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Availability Extension 15 SP7 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libquorum5-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-2.4.6-150300.12.19.1</li>
<li>corosync-debugsource-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync_common4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcpg4-2.4.6-150300.12.19.1</li>
<li>corosync-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcmap4-2.4.6-150300.12.19.1</li>
<li>corosync-qdevice-debuginfo-2.4.6-150300.12.19.1</li>
<li>libvotequorum8-2.4.6-150300.12.19.1</li>
<li>corosync-qnetd-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcorosync-devel-2.4.6-150300.12.19.1</li>
<li>libcpg4-debuginfo-2.4.6-150300.12.19.1</li>
<li>libtotem_pg5-2.4.6-150300.12.19.1</li>
<li>corosync-2.4.6-150300.12.19.1</li>
<li>libsam4-debuginfo-2.4.6-150300.12.19.1</li>
<li>corosync-testagents-2.4.6-150300.12.19.1</li>
<li>libsam4-2.4.6-150300.12.19.1</li>
<li>libquorum5-debuginfo-2.4.6-150300.12.19.1</li>
<li>libcfg6-2.4.6-150300.12.19.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-81665.html">https://www.suse.com/security/cve/CVE-2026-81665.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-81666.html">https://www.suse.com/security/cve/CVE-2026-81666.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1278738">https://bugzilla.suse.com/show_bug.cgi?id=1278738</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1278739">https://bugzilla.suse.com/show_bug.cgi?id=1278739</a>
</li>
</ul>
</div>