SUSE-SU-2026:2367-1: important: Security update for gnutls

[SLE-UPDATES]

# Security update for gnutls

Announcement ID: SUSE-SU-2026:2367-1  
Release Date: 2026-06-11T09:12:53Z  
Rating: important  
References:

  * bsc#1263704
  * bsc#1263705
  * bsc#1263708

  
Cross-References:

  * CVE-2025-9820
  * CVE-2026-33845
  * CVE-2026-33846
  * CVE-2026-42009

  
CVSS scores:

  * CVE-2025-9820 ( SUSE ):  4.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2025-9820 ( NVD ):  4.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-33845 ( SUSE ):  8.8
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-33845 ( SUSE ):  8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2026-33845 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
  * CVE-2026-33845 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-33846 ( 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-2026-33846 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-33846 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42009 ( 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-2026-42009 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42009 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves four vulnerabilities can now be installed.

## Description:

This update for gnutls fixes the following issues

  * CVE-2026-33845: buffers: switch from end_offset over to frag_length
    (bsc#1263704).
  * CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
  * CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers
    (bsc#1263708).

## 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 12 SP5 LTSS  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-2367=1

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-2367=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * libgnutlsxx-devel-3.3.27-3.18.1
    * libgnutls-openssl-devel-3.3.27-3.18.1
    * libgnutls28-debuginfo-3.3.27-3.18.1
    * libgnutls-openssl27-3.3.27-3.18.1
    * gnutls-debugsource-3.3.27-3.18.1
    * gnutls-3.3.27-3.18.1
    * libgnutls28-3.3.27-3.18.1
    * libgnutls-openssl27-debuginfo-3.3.27-3.18.1
    * gnutls-debuginfo-3.3.27-3.18.1
    * libgnutls-devel-3.3.27-3.18.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS (s390x x86_64)
    * libgnutls28-debuginfo-32bit-3.3.27-3.18.1
    * libgnutls28-32bit-3.3.27-3.18.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * libgnutlsxx-devel-3.3.27-3.18.1
    * libgnutls-openssl-devel-3.3.27-3.18.1
    * libgnutls28-debuginfo-32bit-3.3.27-3.18.1
    * libgnutls28-debuginfo-3.3.27-3.18.1
    * libgnutls-openssl27-3.3.27-3.18.1
    * gnutls-debugsource-3.3.27-3.18.1
    * gnutls-3.3.27-3.18.1
    * libgnutls28-3.3.27-3.18.1
    * libgnutls-openssl27-debuginfo-3.3.27-3.18.1
    * libgnutls28-32bit-3.3.27-3.18.1
    * gnutls-debuginfo-3.3.27-3.18.1
    * libgnutls-devel-3.3.27-3.18.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-9820.html
  * https://www.suse.com/security/cve/CVE-2026-33845.html
  * https://www.suse.com/security/cve/CVE-2026-33846.html
  * https://www.suse.com/security/cve/CVE-2026-42009.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1263704
  * https://bugzilla.suse.com/show_bug.cgi?id=1263705
  * https://bugzilla.suse.com/show_bug.cgi?id=1263708

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