SUSE alert openSUSE-SU-2026:20875-1 (ovmf)

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openSUSE-SU-2026:20875-1: important: Security update for ovmf
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Wed, 03 Jun 2026 17:51:19 +0200
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<20260603155119.20450FCCC@maintenance.suse.de>
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Article
openSUSE security update: security update for ovmf
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:20875-1
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 ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * 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-2026-25834 ( 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 ( 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-2026-25835 ( 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 ( 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-2026-34874 ( 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 ( 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 4 vulnerabilities and has 4 bug fixes can now be installed.

Description:

This update for ovmf fixes the following issues:

- CVE-2026-25833: mbedtls: buffer overflow in the `x509_inet_pton_ipv6()` function (bsc#1261476).
- CVE-2026-25834: mbedtls: client accepts signature algorithm chosen by server even if not
advertised in client hello
  (bsc#1261477).
- CVE-2026-25835: mbedtls: no pseudo-random number generator reseed when cloning an application
(bsc#1261478).
- CVE-2026-34874: mbedtls: NULL pointer dereference in distinguished name parsing (bsc#1261469).


Patch instructions:

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

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-865=1

Package List:

- openSUSE Leap 16.0:

  ovmf-202502-160000.5.1
  ovmf-tools-202502-160000.5.1
  qemu-ovmf-ia32-202502-160000.5.1
  qemu-ovmf-x86_64-202502-160000.5.1
  qemu-ovmf-x86_64-debug-202502-160000.5.1
  qemu-uefi-aarch32-202502-160000.5.1
  qemu-uefi-aarch64-202502-160000.5.1
  qemu-uefi-riscv64-202502-160000.5.1

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