What’s Vulnerable › Vulnerabilities

CVE-2021-3982

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-29 · updated 2026-06-17
• Weakness: CWE-273

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.

Affected products

• gnome-shell: all versions

References

• https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2284
• https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2060
• https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2284
• https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2060

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