Security update for grub2

Announcement ID: SUSE-SU-2025:21223-1
Release Date: 2025-12-15T12:50:52Z
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2024-56738 ( SUSE ): 5.7 CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  • CVE-2024-56738 ( SUSE ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
  • CVE-2024-56738 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  • 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 ): 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 Micro 6.2

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

Description:

This update for grub2 fixes the following issues:

Changes in grub2:

  • CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)
  • CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)
  • 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)

  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)

  • Bump upstream SBAT generation to 6

  • Fix "sparse file not allowed" error after grub2-reboot (bsc#1245738)

  • Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)
  • turn off page flipping for i386-pc using VBE video backend (bsc#1245636)
  • Fix boot hangs in setting up serial console when ACPI SPCR table is present and redirection is disabled (bsc#1249088)
  • Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)

  • Skip mount point in grub_find_device function (bsc#1246231)

  • CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959)

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 6.2
    zypper in -t patch SUSE-SL-Micro-6.2-106=1

Package List:

  • SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    • grub2-common-debuginfo-2.12-160000.3.1
    • grub2-2.12-160000.3.1
    • grub2-common-2.12-160000.3.1
  • SUSE Linux Micro 6.2 (aarch64 s390x x86_64)
    • grub2-debugsource-2.12-160000.3.1
  • SUSE Linux Micro 6.2 (noarch)
    • grub2-x86_64-xen-2.12-160000.3.1
    • grub2-x86_64-efi-2.12-160000.3.1
    • grub2-arm64-efi-2.12-160000.3.1
    • grub2-snapper-plugin-2.12-160000.3.1
    • grub2-powerpc-ieee1275-2.12-160000.3.1
    • grub2-i386-pc-2.12-160000.3.1
  • SUSE Linux Micro 6.2 (s390x)
    • grub2-s390x-emu-2.12-160000.3.1

References: