SUSE-SU-2026:1952-1: important: Security update for ovmf

[SLE-SECURITY-UPDATES]

# Security update for ovmf

Announcement ID: SUSE-SU-2026:1952-1  
Release Date: 2026-05-18T07:52:56Z  
Rating: important  
References:

  * bsc#1261469
  * bsc#1261476
  * bsc#1261477
  * bsc#1261478

  
Cross-References:

  * CVE-2026-25833
  * CVE-2026-25834
  * CVE-2026-25835
  * CVE-2026-34874

  
CVSS scores:

  * CVE-2026-25833 ( 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-2026-25833 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-25833 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-25834 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-25834 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
  * CVE-2026-25834 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-25835 ( SUSE ):  8.5
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-25835 ( SUSE ):  7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-25835 ( NVD ):  7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-34874 ( 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-2026-34874 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-34874 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * Server Applications Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7
  * SUSE Package Hub 15 15-SP7

  
  
An update that solves four vulnerabilities can now be installed.

## Description:

This update for ovmf fixes the following issues

  * CVE-2026-25833: mbedtls: buffer underflow in x509_inet_pton_ipv6()
    (bsc#1261476).
  * CVE-2026-25834: mbedtls: Algorithm downgrade vulnerability (bsc#1261477).
  * CVE-2026-25835: mbedtls: PSA random generator cloning (bsc#1261478).
  * CVE-2026-34874: mbedtls: NULL pointer dereference when setting a
    distinguished name (bsc#1261469).

Changes for ovmf:

  * Update mbedtls to 3.6.6.

## 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 Package Hub 15 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-1952=1

  * Server Applications Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP7-2026-1952=1

## Package List:

  * SUSE Package Hub 15 15-SP7 (noarch)
    * qemu-uefi-aarch64-202408-150700.3.18.1
    * qemu-ovmf-x86_64-202408-150700.3.18.1
    * qemu-uefi-aarch32-202408-150700.3.18.1
  * SUSE Package Hub 15 15-SP7 (x86_64)
    * qemu-ovmf-x86_64-debug-202408-150700.3.18.1
  * Server Applications Module 15-SP7 (aarch64 x86_64)
    * ovmf-202408-150700.3.18.1
    * ovmf-tools-202408-150700.3.18.1
  * Server Applications Module 15-SP7 (noarch)
    * qemu-ovmf-x86_64-202408-150700.3.18.1
    * qemu-uefi-aarch64-202408-150700.3.18.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-25833.html
  * https://www.suse.com/security/cve/CVE-2026-25834.html
  * https://www.suse.com/security/cve/CVE-2026-25835.html
  * https://www.suse.com/security/cve/CVE-2026-34874.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1261469
  * https://bugzilla.suse.com/show_bug.cgi?id=1261476
  * https://bugzilla.suse.com/show_bug.cgi?id=1261477
  * https://bugzilla.suse.com/show_bug.cgi?id=1261478

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