SUSE-SU-2026:4658-1: important: Security update for libtcnative-2-0

SLE-SECURITY-UPDATES null at suse.de
Wed Oct 14 12:30:15 UTC 2026 

# Security update for libtcnative-2-0

Announcement ID: SUSE-SU-2026:4658-1  
Release Date: 2026-10-14T07:51:19Z  
Rating: important  
References:

  * bsc#1282621
  * bsc#1282622
  * bsc#1282623

  
Cross-References:

  * CVE-2026-86243
  * CVE-2026-86246
  * CVE-2026-86247

  
CVSS scores:

  * CVE-2026-86243 ( SUSE ):  8.7
    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
  * CVE-2026-86243 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-86243 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-86246 ( SUSE ):  6.3
    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
  * CVE-2026-86246 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-86246 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-86247 ( SUSE ):  9.1
    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
  * CVE-2026-86247 ( SUSE ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-86247 ( NVD ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

  
Affected Products:

  * Basesystem Module 15-SP7
  * openSUSE Leap 15.4
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise High Performance Computing 15 SP5
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP4 LTSS
  * SUSE Linux Enterprise Server 15 SP5
  * SUSE Linux Enterprise Server 15 SP5 LTSS
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP6 LTSS
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7
  * Web and Scripting Module 15-SP7

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for libtcnative-2-0 fixes the following issues:

  * CVE-2026-86243: buffer overread during the TLS handshake permits a malicious
    user to trigger a DoS via a JVM crash (bsc#1282623).
  * 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).
  * CVE-2026-86247: race condition allows client certificate verification
    requirements to be down-graded for some configurations (bsc#1282621).

Changes for libtcnative-2-0:

  * Upgrade to version 2.0.16
  * Security fixes
  * 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.
  * 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.
  * 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.
  * Changes
  * 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
  * Update: Remove support for Windows build on IA64 architecture (Itanium)
  * Update: Make x64 the default architecture for Windows build
  * Update: Make Windows 10 / 11 the default target version for Windows builds
  * Fix: Fix a potential crash when negotiating ALPN
  * 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
  * 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)
  * Code: Remove unused code
  * 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
  * Fix: Fix a potential crash when configuring raw certificates
  * Fix: Avoid a potential crash with very long ALPN protocol names
  * Fix: Make the call to a CertificateVerifier more robust
  * Fix: Avoid a potential crash when processing OCSP URLs
  * Fix: Make the processing of OCSP responses more robust
  * Fix: Stricter OCSP handling when soft-fail is disabled
  * Fix: Harden against the mis-use of Buffer.address(ByteBuffer)
  * Fix: Harden against the mis-use of Pool.destroy(long)

## 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 for SAP Applications 15 SP4  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-4658

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-4658

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-4658

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-4658

  * SUSE Linux Enterprise Server for SAP Applications 15 SP5  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-4658

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-4658

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-4658

  * SUSE Linux Enterprise Server for SAP Applications 15 SP6  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-4658

  * SUSE Linux Enterprise Server 15 SP4 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-4658

  * Basesystem Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-4658

  * Web and Scripting Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Web-Scripting-15-SP7-2026-4658

  * SUSE Linux Enterprise Server 15 SP5 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-4658

  * SUSE Linux Enterprise Server 15 SP6 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-4658

## Package List:

  * SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
    x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
    x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * openSUSE Leap 15.4 (aarch64 i586 ppc64le s390x x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64
    x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64
    x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * Web and Scripting Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1
  * SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
    * libtcnative-2-0-devel-2.0.16-150400.9.6.1
    * libtcnative-2-0-debuginfo-2.0.16-150400.9.6.1
    * libtcnative-2-0-debugsource-2.0.16-150400.9.6.1
    * libtcnative-2-0-2.0.16-150400.9.6.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-86243.html
  * https://www.suse.com/security/cve/CVE-2026-86246.html
  * https://www.suse.com/security/cve/CVE-2026-86247.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1282621
  * https://bugzilla.suse.com/show_bug.cgi?id=1282622
  * https://bugzilla.suse.com/show_bug.cgi?id=1282623

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