RHSA-2025:16154 - Security Advisory

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.

Security Fix(es):

• grub2: grub-core/gettext: Integer overflow leads to Heap OOB Write and Read. (CVE-2024-45776)
• grub2: fs/ufs: OOB write in the heap (CVE-2024-45781)
• grub2: command/gpg: Use-after-free due to hooks not being removed on module unload (CVE-2025-0622)
• grub2: UFS: Integer overflow may lead to heap based out-of-bounds write when handling symlinks (CVE-2025-0677)
• grub2: commands/dump: The dump command is not in lockdown when secure boot is enabled (CVE-2025-1118)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 x86_64
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0 aarch64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0 aarch64
• Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0 x86_64

Fixes

• BZ - 2339182 - CVE-2024-45776 grub2: grub-core/gettext: Integer overflow leads to Heap OOB Write and Read.
• BZ - 2345857 - CVE-2024-45781 grub2: fs/ufs: OOB write in the heap
• BZ - 2345865 - CVE-2025-0622 grub2: command/gpg: Use-after-free due to hooks not being removed on module unload
• BZ - 2346116 - CVE-2025-0677 grub2: UFS: Integer overflow may lead to heap based out-of-bounds write when handling symlinks
• BZ - 2346137 - CVE-2025-1118 grub2: commands/dump: The dump command is not in lockdown when secure boot is enabled
• RHEL-98679 - [RHEL 10 ] After a kernel package is installed, the new kernel entry in grub.cfg is missing the initrd line when GRUB_ENABLE_BLSCFG=false.
• RHEL-98682 - [RHEL 10] After removing a kernel package, the corresponding kernel entry is not removed from grub.cfg when GRUB_ENABLE_BLSCFG=false.

CVEs

• CVE-2024-45776
• CVE-2024-45781
• CVE-2025-0622
• CVE-2025-0677
• CVE-2025-1118

References

• https://access.redhat.com/security/updates/classification/#moderate