Security update for grub2

Announcement ID: SUSE-SU-2025:4197-1
Release Date: 2025-11-24T11:04:07Z
Rating: moderate
References:
Cross-References:
CVSS scores:
  • 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 ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • 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 Enterprise Server 12 SP5
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  • SUSE Linux Enterprise Server for SAP Applications 12 SP5

An update that solves five vulnerabilities can now be installed.

Description:

This update for grub2 fixes the following issues:

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

Other fixes:

  • 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 Enterprise Server 12 SP5 LTSS Extended Security
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2025-4197=1

Package List:

  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    • grub2-x86_64-efi-2.02-193.1
    • grub2-debugsource-2.02-193.1
    • grub2-2.02-193.1
    • grub2-i386-pc-2.02-193.1
    • grub2-debuginfo-2.02-193.1
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (noarch)
    • grub2-x86_64-xen-2.02-193.1
    • grub2-systemd-sleep-plugin-2.02-193.1
    • grub2-snapper-plugin-2.02-193.1

References: