CVE catalog

CVE-2021-3981

grub2: CVE-2021-3981

Severity: Low · CVSS 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Published: Nov 17, 2021, 1:33:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.32% · Oct 25, 2026

A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong permission set allowing non privileged users to read its content. This represents a low severity confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg. This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no version with the fix is currently released.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	grub2	sid	`2.14-4`	fixed
Debian	grub2	forky	`2.14-4`	fixed
Debian	grub2	trixie	`2.12-9+deb13u2`	fixed
Debian	grub2	bookworm	`2.06-13+deb12u2`	fixed
Debian	grub2	bookworm-security	`2.06-13+deb12u1`	fixed
Ubuntu	grub2-signed	pro	`1.22`	vulnerable
Ubuntu	grub2-signed	pro	`1.23`	vulnerable
Ubuntu	grub2-signed	pro	`1.24`	vulnerable
Ubuntu	grub2-signed	pro	`1.25`	vulnerable
Ubuntu	grub2-signed	pro	`1.26`	vulnerable
Ubuntu	grub2-signed	pro	`1.27`	vulnerable
Ubuntu	grub2-signed	pro	`1.30`	vulnerable
Ubuntu	grub2-signed	pro	`1.31`	vulnerable
Ubuntu	grub2-signed	pro	`1.32`	vulnerable
Ubuntu	grub2-signed	pro	`1.33`	vulnerable
Ubuntu	grub2-signed	pro	`1.34`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.1`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.2`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.3`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.4`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.5`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.6`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.7`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.8`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.9`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.13`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.14`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.16`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.17`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.18`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.20`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.22`	vulnerable
Ubuntu	grub2-signed	pro	`1.34.24`	vulnerable
Ubuntu	grub2-signed	16.04	`1.55`	vulnerable
Ubuntu	grub2-signed	16.04	`1.56`	vulnerable
Ubuntu	grub2-signed	16.04	`1.57`	vulnerable
Ubuntu	grub2-signed	16.04	`1.58`	vulnerable
Ubuntu	grub2-signed	16.04	`1.59`	vulnerable
Ubuntu	grub2-signed	16.04	`1.61`	vulnerable
Ubuntu	grub2-signed	16.04	`1.62`	vulnerable
Ubuntu	grub2-signed	16.04	`1.63`	vulnerable
Ubuntu	grub2-signed	16.04	`1.64`	vulnerable
Ubuntu	grub2-signed	16.04	`1.65`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.1`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.2`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.6`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.7`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.8`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.9`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.11`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.12`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.14`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.15`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.16`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.17`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.18`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.19`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.20`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.21`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.22`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.23`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.26`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.27`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.28`	vulnerable
Ubuntu	grub2-signed	16.04	`1.66.29`	vulnerable
Ubuntu	grub2-signed	16.04	`1.167~16.04.1`	vulnerable
Ubuntu	grub2-signed	16.04	`1.167~16.04.2`	vulnerable
Ubuntu	grub2-signed	16.04	`1.167~16.04.4`	vulnerable
Ubuntu	grub2-signed	16.04	`1.167~16.04.6`	vulnerable
Ubuntu	grub2-unsigned	16.04	`2.04-1ubuntu44`	vulnerable
Ubuntu	grub2-unsigned	16.04	`2.04-1ubuntu44.1`	vulnerable
Ubuntu	grub2-unsigned	16.04	`2.04-1ubuntu44.1.2`	vulnerable
Ubuntu	grub2-signed	18.04	`1.85`	vulnerable
Ubuntu	grub2-signed	18.04	`1.86`	vulnerable
Ubuntu	grub2-signed	18.04	`1.87`	vulnerable
Ubuntu	grub2-signed	18.04	`1.89`	vulnerable
Ubuntu	grub2-signed	18.04	`1.91`	vulnerable
Ubuntu	grub2-signed	18.04	`1.92`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.1`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.2`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.3`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.4`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.5`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.7`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.8`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.10`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.11`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.13`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.14`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.15`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.16`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.18`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.19`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.20`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.21`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.22`	vulnerable
Ubuntu	grub2-signed	18.04	`1.93.24`	vulnerable
Ubuntu	grub2-signed	18.04	`1.167~18.04.1`	vulnerable
Ubuntu	grub2-signed	18.04	`1.167~18.04.3`	vulnerable
Ubuntu	grub2-signed	18.04	`1.167~18.04.5`	vulnerable
Ubuntu	grub2-signed	18.04	`1.173.2~18.04.1`	vulnerable
Ubuntu	grub2-signed	18.04	`1.187.2~18.04.1`	vulnerable
Ubuntu	grub2-signed	18.04	`1.187.3~18.04.1`	vulnerable
Ubuntu	grub2-unsigned	18.04	`2.04-1ubuntu44`	vulnerable
Ubuntu	grub2-unsigned	18.04	`2.04-1ubuntu44.1`	vulnerable
Ubuntu	grub2-unsigned	18.04	`2.04-1ubuntu44.1.2`	vulnerable
Ubuntu	grub2-unsigned	18.04	`2.04-1ubuntu47.4`	vulnerable
Ubuntu	grub2-unsigned	18.04	`2.06-2ubuntu14`	vulnerable
Ubuntu	grub2-unsigned	18.04	`2.06-2ubuntu14.1`	vulnerable
Ubuntu	grub2-signed	20.04	`1.128`	vulnerable
Ubuntu	grub2-signed	20.04	`1.129`	vulnerable
Ubuntu	grub2-signed	20.04	`1.130`	vulnerable
Ubuntu	grub2-signed	20.04	`1.131`	vulnerable
Ubuntu	grub2-signed	20.04	`1.133`	vulnerable
Ubuntu	grub2-signed	20.04	`1.134`	vulnerable
Ubuntu	grub2-signed	20.04	`1.135`	vulnerable
Ubuntu	grub2-signed	20.04	`1.136`	vulnerable
Ubuntu	grub2-signed	20.04	`1.137`	vulnerable
Ubuntu	grub2-signed	20.04	`1.138`	vulnerable
Ubuntu	grub2-signed	20.04	`1.139`	vulnerable
Ubuntu	grub2-signed	20.04	`1.140`	vulnerable
Ubuntu	grub2-signed	20.04	`1.141`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.1`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.3`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.4`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.5`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.6`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.8`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.9`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.10`	vulnerable
Ubuntu	grub2-signed	20.04	`1.142.11`	vulnerable
Ubuntu	grub2-signed	20.04	`1.167`	vulnerable
Ubuntu	grub2-signed	20.04	`1.167.2`	vulnerable
Ubuntu	grub2-signed	20.04	`1.173.2~20.04.1`	vulnerable
Ubuntu	grub2-signed	20.04	`1.173.4`	vulnerable
Ubuntu	grub2-signed	20.04	`1.187.2~20.04.2`	vulnerable
Ubuntu	grub2-signed	20.04	`1.187.3~20.04.1`	fixed
Ubuntu	grub2-unsigned	20.04	`2.04-1ubuntu44`	vulnerable
Ubuntu	grub2-unsigned	20.04	`2.04-1ubuntu44.2`	vulnerable
Ubuntu	grub2-unsigned	20.04	`2.04-1ubuntu47.4`	vulnerable
Ubuntu	grub2-unsigned	20.04	`2.04-1ubuntu47.5`	vulnerable
Ubuntu	grub2-unsigned	20.04	`2.06-2ubuntu14`	vulnerable
Ubuntu	grub2-unsigned	20.04	`2.06-2ubuntu14.1`	fixed
Ubuntu	grub2-signed	22.04	`1.173`	vulnerable
Ubuntu	grub2-signed	22.04	`1.174`	vulnerable
Ubuntu	grub2-signed	22.04	`1.176`	vulnerable
Ubuntu	grub2-signed	22.04	`1.177`	vulnerable
Ubuntu	grub2-signed	22.04	`1.178`	vulnerable
Ubuntu	grub2-signed	22.04	`1.179`	vulnerable
Ubuntu	grub2-signed	22.04	`1.180`	vulnerable
Ubuntu	grub2-signed	22.04	`1.182~22.04.1`	vulnerable
Ubuntu	grub2-signed	22.04	`1.187.2`	vulnerable
Ubuntu	grub2-signed	22.04	`1.187.3~22.04.1`	fixed
Ubuntu	grub2-unsigned	22.04	`2.04-1ubuntu47`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.04-1ubuntu48`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.06-2ubuntu3`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.06-2ubuntu4`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.06-2ubuntu5`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.06-2ubuntu6`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.06-2ubuntu7`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.06-2ubuntu10`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.06-2ubuntu14`	vulnerable
Ubuntu	grub2-unsigned	22.04	`2.06-2ubuntu14.1`	fixed
Opensuse	grub2	tumbleweed	`2.06-13.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	grub2	source	sid	`2.06-8`	not yet assigned	Not reported	[1001414]
Debian	grub2	source	forky	`2.06-8`	not yet assigned	Not reported	[1001414]
Debian	grub2	source	trixie	`2.06-8`	not yet assigned	Not reported	[1001414]
Debian	grub2	source	bookworm	`2.06-8`	not yet assigned	Not reported	[1001414]
Ubuntu	grub2-signed	deb	20.04	`1.187.3~20.04.1`	Not reported	UBUNTU-CVE-2021-3981	Not reported
Ubuntu	grub2-unsigned	deb	20.04	`2.06-2ubuntu14.1`	Not reported	UBUNTU-CVE-2021-3981	Not reported
Ubuntu	grub2-signed	deb	22.04	`1.187.3~22.04.1`	Not reported	UBUNTU-CVE-2021-3981	Not reported
Ubuntu	grub2-unsigned	deb	22.04	`2.06-2ubuntu14.1`	Not reported	UBUNTU-CVE-2021-3981	Not reported
Opensuse	grub2	rpm	tumbleweed	`2.06-13.1`	Not reported	OPENSUSE-SU-2024:11700-1	Not reported

[Debian bug #1001414]

OpenFactory catalog packages

[openSUSE Tumbleweed]

[grub2-branding-upstream]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-common]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-efi]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-efi-bls]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-efi-debug]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-efi-extras]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-pc]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-pc-debug]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-pc-extras]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-xen]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-xen-debug]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-i386-xen-extras]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-snapper-plugin]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-systemd-sleep-plugin]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-x86_64-efi]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-x86_64-efi-bls]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-x86_64-efi-debug]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-x86_64-efi-extras]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-x86_64-xen]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed
[grub2-x86_64-xen-debug]Unknown
Source package: [grub2]
Details (1)
- 2.14-18.1 · noarch · tumbleweed
  Unknown · Fixed: 2.06-13.1
  Version impact unknown
  dsa · grub2 · opensuse · tumbleweed

Next results

Observed: Oct 23, 2026, 6:02:18 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]