# CVE-2021-3981: grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...

CVE-2021-3981 is fixed in 36 products on 1 platform, first by DEBIAN-CVE-2021-3981, released March 10, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-3981
- Priority: Routine
- CVSS: 3.3 (low)
- EPSS: 0.0032
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 10, 2022

## 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: Incorrect permission in grub.cfg allow unprivileged user to read the file content (CVE-2021-3981)  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 AlmaLinux Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | grub-efi-amd64 Ubuntu 20.04 LTS (focal) | 2.06-2ubuntu14.1 | [grub-efi-amd64 2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-grub-efi-amd64-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-amd64 Ubuntu 22.04.1 LTS (jammy) | 2.06-2ubuntu14.1 | [grub-efi-amd64 2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-grub-efi-amd64-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-amd64-bin Ubuntu 20.04 LTS (focal) | 2.06-2ubuntu14.1 | [grub-efi-amd64-bin 2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-grub-efi-amd64-bin-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-amd64-bin Ubuntu 22.04.1 LTS (jammy) | 2.06-2ubuntu14.1 | [grub-efi-amd64-bin 2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-grub-efi-amd64-bin-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-amd64-signed Ubuntu 20.04 LTS (focal) | 1.187.3~20.04.1+2.06-2ubuntu14.1 | [grub-efi-amd64-signed 1.187.3~20.04.1+2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-grub-efi-amd64-signed-1.187.3-20.04.1-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-amd64-signed Ubuntu 22.04.1 LTS (jammy) | 1.187.3~22.04.1+2.06-2ubuntu14.1 | [grub-efi-amd64-signed 1.187.3~22.04.1+2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-grub-efi-amd64-signed-1.187.3-22.04.1-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-arm64 Ubuntu 20.04 LTS (focal) | 2.06-2ubuntu14.1 | [grub-efi-arm64 2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-grub-efi-arm64-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-arm64 Ubuntu 22.04.1 LTS (jammy) | 2.06-2ubuntu14.1 | [grub-efi-arm64 2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-grub-efi-arm64-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-arm64-bin Ubuntu 20.04 LTS (focal) | 2.06-2ubuntu14.1 | [grub-efi-arm64-bin 2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-grub-efi-arm64-bin-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-arm64-bin Ubuntu 22.04.1 LTS (jammy) | 2.06-2ubuntu14.1 | [grub-efi-arm64-bin 2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-grub-efi-arm64-bin-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-arm64-signed Ubuntu 20.04 LTS (focal) | 1.187.3~20.04.1+2.06-2ubuntu14.1 | [grub-efi-arm64-signed 1.187.3~20.04.1+2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-grub-efi-arm64-signed-1.187.3-20.04.1-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub-efi-arm64-signed Ubuntu 22.04.1 LTS (jammy) | 1.187.3~22.04.1+2.06-2ubuntu14.1 | [grub-efi-arm64-signed 1.187.3~22.04.1+2.06-2ubuntu14.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-grub-efi-arm64-signed-1.187.3-22.04.1-2.06-2ubuntu14.1.md) | Jul 19, 2023 |
| Linux | grub2 Debian 12.15 (bookworm) | 2.06-8 | [DEBIAN-CVE-2021-3981](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3981.md) | Mar 10, 2022 |
| Linux | grub2 Debian 13.5 (trixie) | 2.06-8 | [DEBIAN-CVE-2021-3981](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3981.md) | Mar 10, 2022 |
| Linux | grub2 Debian 14 | 2.06-8 | [DEBIAN-CVE-2021-3981](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3981.md) | Mar 10, 2022 |
| Linux | grub2 rocky 8 | 1:2.02-123.el8 | [RLSA-2022:2110](https://patchblox.com/security/data/fix/linux/rlsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-common RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-common almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-common amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-common ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-debugsource amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-aa64 RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-aa64 almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-aa64 amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-aa64 ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-efi-aa64-cdboot RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-aa64-cdboot almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-aa64-cdboot amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-aa64-cdboot ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-efi-aa64-ec2 amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-aa64-modules RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-aa64-modules almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-aa64-modules amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-aa64-modules ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-efi-ia32 RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-ia32 almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-ia32 ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-efi-ia32-cdboot RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-ia32-cdboot almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-ia32-cdboot ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-efi-ia32-modules RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-ia32-modules almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-ia32-modules ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-efi-x64 RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-x64 almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-x64 amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-x64 ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-efi-x64-cdboot RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-x64-cdboot almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-x64-cdboot amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-x64-cdboot ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-efi-x64-ec2 amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-x64-modules RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-x64-modules almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-efi-x64-modules amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-efi-x64-modules ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-emu amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-emu-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-emu-modules amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-pc RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-pc almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-pc amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-pc ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-pc-modules RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-pc-modules almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-pc-modules amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-pc-modules ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-ppc64le RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-ppc64le almalinux 8 | 1:2.02-123.el8_6.8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-ppc64le-modules RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-ppc64le-modules almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-tools ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-tools-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-tools-efi RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools-efi almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools-efi amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-tools-efi ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-tools-efi-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-tools-extra RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools-extra almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools-extra amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-tools-extra ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-tools-extra-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-tools-minimal RHEL 8 | 1:2.02-123.el8 | [RHSA-2022:2110](https://patchblox.com/security/data/fix/linux/rhsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools-minimal almalinux 8 | 1:2.02-123.el8.alma | [ALSA-2022:2110](https://patchblox.com/security/data/fix/linux/alsa-2022-2110.md) | May 10, 2022 |
| Linux | grub2-tools-minimal amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |
| Linux | grub2-tools-minimal ol 8 | 1:2.02-123.0.1.el8 | [ELSA-2022-2110](https://patchblox.com/security/data/fix/linux/elsa-2022-2110.md) | May 17, 2022 |
| Linux | grub2-tools-minimal-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.3 | [ALAS2023-2023-020](https://patchblox.com/security/data/fix/linux/alas2023-2023-020.md) | Feb 17, 2023 |

---

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