Security update for grub2

Announcement ID: SUSE-SU-2026:21621-1
Release Date: 2026-05-11T08:46:20Z
Rating: moderate
References:
Cross-References:
CVSS scores:
  • CVE-2025-54770 ( SUSE ): 2.1 CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-54770 ( SUSE ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-54770 ( NVD ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-54771 ( SUSE ): 2.1 CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-54771 ( SUSE ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-54771 ( NVD ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-61661 ( SUSE ): 4.3 CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
  • CVE-2025-61661 ( SUSE ): 4.8 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
  • CVE-2025-61661 ( NVD ): 4.8 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
  • CVE-2025-61662 ( SUSE ): 2.1 CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-61662 ( SUSE ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-61662 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2025-61662 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2025-61663 ( SUSE ): 2.1 CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-61663 ( SUSE ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-61663 ( NVD ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-61664 ( SUSE ): 2.1 CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-61664 ( SUSE ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-61664 ( NVD ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected Products:
  • SUSE Linux Micro 6.0

An update that solves six vulnerabilities can now be installed.

Description:

This update for grub2 fixes the following issues

  • CVE-2025-54770: Missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930).
  • CVE-2025-54771: grub_file_close() does not properly controls the fs refcount (bsc#1252931).
  • CVE-2025-61661: Out-of-bounds write in grub_usb_get_string() function (bsc#1252932).
  • CVE-2025-61662: Missing unregister call for gettext command may lead to use-after-free (bsc#1252933).
  • CVE-2025-61663: Missing unregister call for normal commands may lead to use-after-free (bsc#1252934).
  • CVE-2025-61664: Missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935).

Changes for grub2:

  • Bump upstream SBAT generation to 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 Linux Micro 6.0
    zypper in -t patch SUSE-SLE-Micro-6.0-702=1

Package List:

  • SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    • grub2-2.12~rc1-8.1
    • grub2-debugsource-2.12~rc1-8.1
    • grub2-debuginfo-2.12~rc1-8.1
  • SUSE Linux Micro 6.0 (noarch)
    • grub2-snapper-plugin-2.12~rc1-8.1
    • grub2-arm64-efi-2.12~rc1-8.1
    • grub2-i386-pc-2.12~rc1-8.1
    • grub2-x86_64-xen-2.12~rc1-8.1
    • grub2-x86_64-efi-2.12~rc1-8.1
  • SUSE Linux Micro 6.0 (s390x)
    • grub2-s390x-emu-2.12~rc1-8.1

References: