<div class="container">
<h1>Security update for libtcnative-2-0</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:4658-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-10-14T07:51:19Z</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=1282621">bsc#1282621</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1282622">bsc#1282622</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1282623">bsc#1282623</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-2026-86243.html">CVE-2026-86243</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-86246.html">CVE-2026-86246</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-86247.html">CVE-2026-86247</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-2026-86243</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-2026-86243</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-2026-86243</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-2026-86246</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:L/VI:L/VA:N/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-86246</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:N/UI:N/S:U/C:L/I:L/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-86246</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">9.1</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-86247</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">9.1</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-86247</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.4</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-86247</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.4</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">Basesystem Module 15-SP7</li>
<li class="list-group-item">openSUSE Leap 15.4</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 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 High Performance Computing ESPOS 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing LTSS 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing LTSS 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Real Time 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP4 LTSS</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP5 LTSS</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP6</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP6 LTSS</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">Web and Scripting Module 15-SP7</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves three vulnerabilities can now be installed.</p>
<h2>Description:</h2>
<p>This update for libtcnative-2-0 fixes the following issues:</p>
<ul>
<li>CVE-2026-86243: buffer overread during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash
(bsc#1282623).</li>
<li>CVE-2026-86246: insecure ALLOW_CLIENT_RENEGOTIATION, NO_EXTENDED_MASTER_SECRET, IGNORE_UNEXPECTED_EOF and
ALLOW_NO_DHE_KEX options enabled by default (bsc#1282622).</li>
<li>CVE-2026-86247: race condition allows client certificate verification requirements to be down-graded for some
configurations (bsc#1282621).</li>
</ul>
<p>Changes for libtcnative-2-0:</p>
<ul>
<li>Upgrade to version 2.0.16</li>
<li>Security fixes</li>
<li>Client certificate requirements can be down-graded
(bsc#1282621, CVE-2026-86247)
A race condition allowed client certificate verification
requirements to be down-graded for some configurations.</li>
<li>Insecure OpenSSL options enabled (bsc#1282622, CVE-2026-86246)
Apache Tomcat Native enabled insecure options by default
including ALLOW_CLIENT_RENEGOTIATION,
NO_EXTENDED_MASTER_SECRET, IGNORE_UNEXPECTED_EOF and
ALLOW_NO_DHE_KEX.</li>
<li>DoS via TLS handshake (bsc#1282623, CVE-2026-86243)
A buffer over-read vulnerability in Apache Tomcat Native
during the TLS handshaking permits a malicious user to trigger
a DoS via a JVM crash.</li>
<li>Changes</li>
<li>Code: Remove call to ERR_remove_thread_state() from Windows
specific code to allow building with OpenSSL 4.0.x
ERR_remove_thread_state() is a no-op in OpenSSL 1.1+ and got
removed in OpenSSL 4</li>
<li>Update: Remove support for Windows build on IA64 architecture
(Itanium)</li>
<li>Update: Make x64 the default architecture for Windows build</li>
<li>Update: Make Windows 10 / 11 the default target version for
Windows builds</li>
<li>Fix: Fix a potential crash when negotiating ALPN</li>
<li>Fix: If ALPN negotiation fails and failure is configured to
use the last server protocol in the list, use it rather than
the last protocol offered by the client</li>
<li>Fix: Add support for the extended range of options available
from OpenSSL 3.0.x. The options flag is now a 64-bit unsigned
int (represented by a Java long) rather than a 32-bit unsigned
int (represented by a Java int)</li>
<li>Code: Remove unused code</li>
<li>Fix: Ensure that per connection changes to certificate
verification settings, e.g. to support client certificate
authentication, do not modify the certificate verification
settings for other connections</li>
<li>Fix: Fix a potential crash when configuring raw certificates</li>
<li>Fix: Avoid a potential crash with very long ALPN protocol
names</li>
<li>Fix: Make the call to a CertificateVerifier more robust</li>
<li>Fix: Avoid a potential crash when processing OCSP URLs</li>
<li>Fix: Make the processing of OCSP responses more robust</li>
<li>Fix: Stricter OCSP handling when soft-fail is disabled</li>
<li>Fix: Harden against the mis-use of Buffer.address(ByteBuffer)</li>
<li>Fix: Harden against the mis-use of Pool.destroy(long)</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 for SAP Applications 15 SP4
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-4658</code>
</li>
<li class="list-group-item">
openSUSE Leap 15.4
<br/>
<code>zypper in -t patch SUSE-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server for SAP Applications 15 SP5
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
<br/>
<code>zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server for SAP Applications 15 SP6
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 15 SP4 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-4658</code>
</li>
<li class="list-group-item">
Basesystem Module 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-4658</code>
</li>
<li class="list-group-item">
Web and Scripting Module 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Web-Scripting-15-SP7-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 15 SP5 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-4658</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 15 SP6 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-4658</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64 x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64 x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
openSUSE Leap 15.4 (aarch64 i586 ppc64le s390x x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64 x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64 x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
Web and Scripting Module 15-SP7 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
<ul>
<li>libtcnative-2-0-devel-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-debugsource-2.0.16-150400.9.6.1</li>
<li>libtcnative-2-0-2.0.16-150400.9.6.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-86243.html">https://www.suse.com/security/cve/CVE-2026-86243.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-86246.html">https://www.suse.com/security/cve/CVE-2026-86246.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-86247.html">https://www.suse.com/security/cve/CVE-2026-86247.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1282621">https://bugzilla.suse.com/show_bug.cgi?id=1282621</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1282622">https://bugzilla.suse.com/show_bug.cgi?id=1282622</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1282623">https://bugzilla.suse.com/show_bug.cgi?id=1282623</a>
</li>
</ul>
</div>