Medium severity · published Apr 29, 2022
CVE-2021-3982
Linux distributions using CAP_SYS_NICE for gnome-shell may be exposed to a privilege escalation issue
5.5
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GN
Gnome-shell · Gnome
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3982
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3982
Issue Tracking
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2284
Issue Tracking
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2060
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