5.5

CVE-2021-3982: gnome gnome-shell Improper Check for Dropped Privileges

CVSS: 5.5v3.1MediumModified
AliasesMGASA-2022-0007UBUNTU-CVE-2021-3982
Published 29-04-2022Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-3982 is a medium (CVSS 5.5) Improper Check for Dropped Privileges vulnerability in gnome gnome-shell. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 29-04-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Linux distributions using CAP_SYS_NICE for gnome-shell may be exposed to a privilege escalation issue. An attacker, with low privilege permissions, may take advantage of the way CAP_SYS_NICE is currently implemented and eventually load code to increase its process scheduler priority leading to possible DoS of other services running in the same machine.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

0.00 pp

From 0.29% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.29%

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

Gnome1 product
Mageia1 product
  • gnome-shell< 3.38.3-2.1.mga8
Ubuntu1 product
  • gnome-shellAll versions (No fix recorded)

3 vendors · 3 products

References

7 links