Vulnerability in GNOME Gnome-Shell
CVE-2021-3982
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (19.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- GNOME Gnome-Shell
- Gnome-Shell — versions gnome-shell downstream versions using CAP_SYS_NICE
Weakness classification (CWE)
References
- gitlab.gnome.org/GNOME/gnome-shell/-/issues/2284 (Patch, Third Party Advisory, Issue Tracking)
- gitlab.gnome.org/GNOME/mutter/-/merge_requests/2060 (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2021-3982?
- CVE-2021-3982 is a medium-severity vulnerability in GNOME Gnome-Shell, classified under Improper Check for Dropped Privileges. CVSS score: 5.5/10. Published 2022-04-29.
- How severe is CVE-2021-3982?
- Medium severity. CVSS v3 base score is 5.5 out of 10.