Vulnerability · Published Dec 19, 2022 · Assigned by redhat
CVE-2022-3775
High 7.1
In plain English
A high-severity out-of-bounds write in grub2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | grub2-common | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-common | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-efi-aa64 | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-efi-aa64 | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-efi-aa64-cdboot | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-efi-aa64-cdboot | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-efi-aa64-modules | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-efi-aa64-modules | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-efi-ia32 | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:8 | grub2-efi-ia32-cdboot | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:8 | grub2-efi-ia32-modules | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:8 | grub2-efi-x64 | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-efi-x64 | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-efi-x64-cdboot | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-efi-x64-cdboot | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-efi-x64-modules | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-efi-x64-modules | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-pc | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-pc | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-pc-modules | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-pc-modules | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-ppc64le | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-ppc64le | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-ppc64le-modules | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-ppc64le-modules | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-tools | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-tools | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-tools-efi | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-tools-efi | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-tools-extra | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-tools-extra | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| AlmaLinux:8 | grub2-tools-minimal | 1:2.02-142.el8_7.1.alma | ALSA-2023:0049 |
| AlmaLinux:9 | grub2-tools-minimal | 1:2.06-46.el9_1.3.alma | ALSA-2023:0752 |
| Debian:12 | grub2 | 2.06-5 | DEBIAN-CVE-2022-3775 |
| Debian:13 | grub2 | 2.06-5 | DEBIAN-CVE-2022-3775 |
| Debian:14 | grub2 | 2.06-5 | DEBIAN-CVE-2022-3775 |
| Rocky Linux:8 | grub2 | 1:2.02-142.el8_7.1.rocky.0.2 | RLSA-2023:0049 |
| Rocky Linux:9 | grub2 | 1:2.06-46.el9_1.3.rocky.0.2 | RLSA-2023:0752 |
| Ubuntu:22.04:LTS | grub2-signed | 1.187.3~22.04.1 | USN-6355-1 |
| Ubuntu:22.04:LTS | grub2-signed | 1.187.3~22.04.1 | UBUNTU-CVE-2022-3775 |
| Ubuntu:22.04:LTS | grub2-unsigned | 2.06-2ubuntu14 | UBUNTU-CVE-2022-3775 |
| Ubuntu:22.04:LTS | grub2-unsigned | 2.06-2ubuntu14.1 | USN-6355-1 |
| Ubuntu:22.04:LTS | shim | 15.7-0ubuntu1 | USN-6355-1 |
| Ubuntu:22.04:LTS | shim-signed | 1.51.3 | USN-6355-1 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H