CVE-2021-3982 Privilege escalation in gnome-shell
Low-privilege attackers can exploit CAP_SYS_NICE in gnome-shell to escalate privileges and cause denial of service on Linux systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3982?
CVE-2021-3982 is a medium-severity vulnerability in gnome-shell, published on 29 Apr 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-273
Which versions are affected by CVE-2021-3982?
It affects 1 product.
Products include Gnome Gnome-Shell.
How do I fix CVE-2021-3982?
Apply the vendor's patch.
Is CVE-2021-3982 being exploited?
There is no known exploitation of CVE-2021-3982 in the wild and no public exploit code.
Other vulnerabilities in gnome-shell
Sources
Also known as GHSA-w69m-w3gr-72pp, MGASA-2022-0007, UBUNTU-CVE-2021-3982.