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Zwei Probleme in corosync (SUSE)
Дата публикации: 24-09-2026 23:49:10



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# Security update for corosync

Announcement ID: SUSE-SU-2026:23850-1
Release Date: 2026-09-20T04:53:53Z
Rating: important
References:

* bsc#1278738
* bsc#1278739

Cross-References:

* CVE-2026-81665
* CVE-2026-81666

CVSS scores:

* CVE-2026-81665 ( SUSE ): 7.7
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
* CVE-2026-81665 ( SUSE ): 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-81665 ( NVD ): 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-81666 ( SUSE ): 7.1
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
* CVE-2026-81666 ( SUSE ): 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-81666 ( NVD ): 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:

* SUSE Linux Enterprise Server 16.0
* SUSE Linux Enterprise Server High Availability Extension 16.0

An update that solves two vulnerabilities can now be installed.

## Description:

This update for corosync fixes the following issues:

* CVE-2026-81665: heap-based buffer overflow in totempg assembly buffer
during
fragmented message reassembly (bsc#1278738).
* CVE-2026-81666: integer overflow in check_memb_commit_token_sanity may
bypass message length validation on 32-bit systems (bsc#1278739).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

* SUSE Linux Enterprise Server High Availability Extension 16.0
zypper in -t patch SUSE-SLES-HA-16.0-1714

## Package List:

* SUSE Linux Enterprise Server High Availability Extension 16.0 (ppc64le
s390x
x86_64)
* corosync-libs-3.1.9-160000.4.1
* corosync-devel-3.1.9-160000.4.1
* corosync-debuginfo-3.1.9-160000.4.1
* corosync-libs-debuginfo-3.1.9-160000.4.1
* corosync-3.1.9-160000.4.1
* corosync-debugsource-3.1.9-160000.4.1

## References:

* https://www.suse.com/security/cve/CVE-2026-81665.html
* https://www.suse.com/security/cve/CVE-2026-81666.html
* https://bugzilla.suse.com/show_bug.cgi?id=1278738
* https://bugzilla.suse.com/show_bug.cgi?id=1278739

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<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-2026:23850-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-09-20T04:53:53Z</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">SUSE Linux
Enterprise Server 16.0</li>

<li class="list-group-item">SUSE Linux
Enterprise Server High Availability Extension 16.0</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">
SUSE Linux Enterprise Server High Availability Extension 16.0

<br/>
<code>zypper in -t patch
SUSE-SLES-HA-16.0-1714</code>

</li>

</ul>

<h2>Package List:</h2>
<ul>

<li>
SUSE Linux Enterprise Server High Availability Extension
16.0 (ppc64le s390x x86_64)
<ul>

<li>corosync-libs-3.1.9-160000.4.1</li>

<li>corosync-devel-3.1.9-160000.4.1</li>

<li>corosync-debuginfo-3.1.9-160000.4.1</li>

<li>corosync-libs-debuginfo-3.1.9-160000.4.1</li>

<li>corosync-3.1.9-160000.4.1</li>

<li>corosync-debugsource-3.1.9-160000.4.1</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>

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