RHSA-2025:6990 - Security Advisory

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 9.

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: reader/jpeg: Heap OOB Write during JPEG parsing (CVE-2024-45774)
• grub2: commands/extcmd: Missing check for failed allocation (CVE-2024-45775)
• 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: fs/hfs+: refcount can be decremented twice (CVE-2024-45783)
• 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: read: Integer overflow may lead to out-of-bounds write (CVE-2025-0690)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes linked from 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 9 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.6 x86_64
• Red Hat Enterprise Linux Server - AUS 9.6 x86_64
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.6 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.6 aarch64

Fixes

• BZ - 2337461 - CVE-2024-45774 grub2: reader/jpeg: Heap OOB Write during JPEG parsing
• BZ - 2337481 - CVE-2024-45775 grub2: commands/extcmd: Missing check for failed allocation
• 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 - 2345863 - CVE-2024-45783 grub2: fs/hfs+: refcount can be decremented twice
• 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 - 2346123 - CVE-2025-0690 grub2: read: Integer overflow may lead to out-of-bounds write
• RHEL-61263 - Grub2 patch 0351 will cause system crash
• RHEL-25558 - grub2-mkconfig does not honor escapes for options in /boot/loader/entries when run with --update-bls-cmdline

CVEs

• CVE-2024-45774
• CVE-2024-45775
• CVE-2024-45776
• CVE-2024-45781
• CVE-2024-45783
• CVE-2025-0622
• CVE-2025-0677
• CVE-2025-0690

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/9.6_release_notes/index