Security update for grub2

Announcement ID: SUSE-SU-2025:02725-1
Release Date: 2025-08-07T09:01:46Z
Rating: moderate
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
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 one vulnerability can now be installed.

Description:

This update for grub2 fixes the following issues:

  • 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 Enterprise Server 12 SP5 LTSS Extended Security
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2025-2725=1

Package List:

  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    • grub2-x86_64-efi-2.02-190.1
    • grub2-debugsource-2.02-190.1
    • grub2-i386-pc-2.02-190.1
    • grub2-2.02-190.1
    • grub2-debuginfo-2.02-190.1
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (noarch)
    • grub2-systemd-sleep-plugin-2.02-190.1
    • grub2-snapper-plugin-2.02-190.1
    • grub2-x86_64-xen-2.02-190.1

References: