CVE-2021-3982

low-risk
Published 2022-04-29

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.

Do I need to act?

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0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Gnome-Shell

Affected Vendors

Gnome

References (4)

Issue Tracking https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2284
Issue Tracking https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2060
Issue Tracking https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2284
Issue Tracking https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2060
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal