SUSE-SU-2025:21223-1: important: Security update for grub2

SLE-SECURITY-UPDATES null at suse.de
Thu Dec 18 16:30:41 UTC 2025 


# Security update for grub2

Announcement ID: SUSE-SU-2025:21223-1  
Release Date: 2025-12-15T12:50:52Z  
Rating: important  
References:

  * bsc#1234959
  * bsc#1245636
  * bsc#1245738
  * bsc#1245953
  * bsc#1246231
  * bsc#1247242
  * bsc#1249088
  * bsc#1249385
  * bsc#1252930
  * bsc#1252931
  * bsc#1252932
  * bsc#1252933
  * bsc#1252934
  * bsc#1252935

  
Cross-References:

  * CVE-2024-56738
  * CVE-2025-54770
  * CVE-2025-54771
  * CVE-2025-61661
  * CVE-2025-61662
  * CVE-2025-61663
  * CVE-2025-61664

  
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:

  * https://www.suse.com/security/cve/CVE-2024-56738.html
  * https://www.suse.com/security/cve/CVE-2025-54770.html
  * https://www.suse.com/security/cve/CVE-2025-54771.html
  * https://www.suse.com/security/cve/CVE-2025-61661.html
  * https://www.suse.com/security/cve/CVE-2025-61662.html
  * https://www.suse.com/security/cve/CVE-2025-61663.html
  * https://www.suse.com/security/cve/CVE-2025-61664.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1234959
  * https://bugzilla.suse.com/show_bug.cgi?id=1245636
  * https://bugzilla.suse.com/show_bug.cgi?id=1245738
  * https://bugzilla.suse.com/show_bug.cgi?id=1245953
  * https://bugzilla.suse.com/show_bug.cgi?id=1246231
  * https://bugzilla.suse.com/show_bug.cgi?id=1247242
  * https://bugzilla.suse.com/show_bug.cgi?id=1249088
  * https://bugzilla.suse.com/show_bug.cgi?id=1249385
  * https://bugzilla.suse.com/show_bug.cgi?id=1252930
  * https://bugzilla.suse.com/show_bug.cgi?id=1252931
  * https://bugzilla.suse.com/show_bug.cgi?id=1252932
  * https://bugzilla.suse.com/show_bug.cgi?id=1252933
  * https://bugzilla.suse.com/show_bug.cgi?id=1252934
  * https://bugzilla.suse.com/show_bug.cgi?id=1252935

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.suse.com/pipermail/sle-security-updates/attachments/20251218/b27b3a55/attachment.htm>

More information about the sle-security-updates mailing list