Issued:

2022-12-13

Updated:

2022-12-13

RHSA-2022:8978 - Moderate: grub2 security and bug fix update

Synopsis

Moderate: grub2 security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.

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: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass (CVE-2022-2601)

• grub2: Heap based out-of-bounds write when redering certain unicode sequences (CVE-2022-3775)

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.

Bug Fix(es):

• Kernel Panic on Milan when enable SEV/SEV-ES with CPU: 1 PID: 1 Comm: swapper/0 Not tainted (BZ#2130104)

• [RHEL9.0][SecureBoot][Denali/P10] boot process stops at grub prompt after copying the signed grub to prep partition (BZ#2134358)

• RHEL9.0 [MAXconfig]: Denali LPAR crashs while booting MAX config 240c / 64TB - 192 decimal is the biggest partition min value Linux can handle? (BZ#2134434)

• ISST-LTE:[P10]:RPT:After FW update,while activating the lpar dexlp87 went to ERROR state with LED B2008105 - 7E sub return code (BZ#2135288)

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

Updated Packages

• grub2-emu-debuginfo-2.06-27.el9_0.12.x86_64.rpm
• grub2-common-2.06-27.el9_0.12.noarch.rpm
• grub2-efi-aa64-modules-2.06-27.el9_0.12.noarch.rpm
• grub2-tools-debuginfo-2.06-27.el9_0.12.aarch64.rpm
• grub2-tools-extra-debuginfo-2.06-27.el9_0.12.aarch64.rpm
• grub2-tools-minimal-2.06-27.el9_0.12.ppc64le.rpm
• grub2-debugsource-2.06-27.el9_0.12.aarch64.rpm
• grub2-efi-x64-modules-2.06-27.el9_0.12.noarch.rpm
• grub2-debuginfo-2.06-27.el9_0.12.ppc64le.rpm
• grub2-debuginfo-2.06-27.el9_0.12.x86_64.rpm
• grub2-emu-debuginfo-2.06-27.el9_0.12.aarch64.rpm
• grub2-debugsource-2.06-27.el9_0.12.x86_64.rpm
• grub2-ppc64le-modules-2.06-27.el9_0.12.noarch.rpm
• grub2-tools-extra-2.06-27.el9_0.12.aarch64.rpm
• grub2-tools-extra-2.06-27.el9_0.12.x86_64.rpm
• grub2-debugsource-2.06-27.el9_0.12.ppc64le.rpm
• grub2-tools-debuginfo-2.06-27.el9_0.12.ppc64le.rpm
• grub2-efi-x64-2.06-27.el9_0.12.x86_64.rpm
• grub2-pc-modules-2.06-27.el9_0.12.noarch.rpm
• grub2-tools-2.06-27.el9_0.12.x86_64.rpm
• grub2-tools-debuginfo-2.06-27.el9_0.12.x86_64.rpm
• grub2-ppc64le-2.06-27.el9_0.12.ppc64le.rpm
• grub2-tools-extra-debuginfo-2.06-27.el9_0.12.ppc64le.rpm
• grub2-tools-extra-debuginfo-2.06-27.el9_0.12.x86_64.rpm
• grub2-tools-minimal-2.06-27.el9_0.12.aarch64.rpm
• grub2-tools-minimal-2.06-27.el9_0.12.x86_64.rpm
• grub2-pc-2.06-27.el9_0.12.x86_64.rpm
• grub2-tools-minimal-debuginfo-2.06-27.el9_0.12.ppc64le.rpm
• grub2-tools-minimal-debuginfo-2.06-27.el9_0.12.x86_64.rpm
• grub2-efi-aa64-cdboot-2.06-27.el9_0.12.aarch64.rpm
• grub2-2.06-27.el9_0.12.src.rpm
• grub2-efi-aa64-2.06-27.el9_0.12.aarch64.rpm
• grub2-efi-x64-cdboot-2.06-27.el9_0.12.x86_64.rpm
• grub2-tools-minimal-debuginfo-2.06-27.el9_0.12.aarch64.rpm
• grub2-tools-extra-2.06-27.el9_0.12.ppc64le.rpm
• grub2-tools-2.06-27.el9_0.12.aarch64.rpm
• grub2-tools-2.06-27.el9_0.12.ppc64le.rpm
• grub2-tools-efi-debuginfo-2.06-27.el9_0.12.x86_64.rpm
• grub2-tools-efi-2.06-27.el9_0.12.x86_64.rpm
• grub2-debuginfo-2.06-27.el9_0.12.aarch64.rpm

Fixes

• This content is not included.BZ - 2112975
• This content is not included.BZ - 2138880

CVEs

• CVE-2022-2601
• CVE-2022-3775

References

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

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.