3.3

CVE-2021-3981: fedoraproject fedora Incorrect Default Permissions

CVSS: 3.3v3.1LowModified
AliasesRHSA-2022:2110UBUNTU-CVE-2021-3981DEBIAN-CVE-2021-3981
Published 08-03-2022Last modified 13-02-2025
Open JSON

Vulnerability summary

CVE-2021-3981 is a low (CVSS 3.3) Incorrect Default Permissions vulnerability in fedoraproject fedora. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.3% of scored vulnerabilities.

Overall risk
13/100
0100
Low · default modelHow is this calculated?
CVSS score
3.3/10
010
Low · v3.1 (NVD)
EPSS score
0.32%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-6355-1

Timeline

  1. 08-03-2022
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

0.00 pp

From 0.32% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.32%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat25 products
  • grub2< 1:2.02-123.el8
  • grub2-common< 1:2.02-123.el8
  • grub2-debuginfo< 1:2.02-123.el8
  • grub2-debugsource< 1:2.02-123.el8
  • grub2-efi-aa64< 1:2.02-123.el8
Ubuntu2 products
  • grub2-signedAll versions (No fix recorded) | < 1.187.3~20.04.1 | < 1.187.3~22.04.1
  • grub2-unsignedAll versions (No fix recorded) | < 2.06-2ubuntu14.1
Debian1 product
  • grub2< 2.06-8
Fedoraproject1 product
Gnu1 product
Opensuse1 product
  • grub2&distro=openSUSE Tumbleweed< 2.06-13.1

6 vendors · 31 products

References

23 links
Show all 23 references