UBUNTU-CVE-2021-3982

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Source

https://ubuntu.com/security/CVE-2021-3982

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3982.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3982

Upstream

CVE-2021-3982

Published

2022-04-29T17:15:00Z

Modified

2025-09-08T16:46:50Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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.

References

Affected packages

Ubuntu:Pro:16.04:LTS / gnome-shell

Package

Name: gnome-shell
Purl: pkg:deb/ubuntu/gnome-shell@3.18.5-0ubuntu0.3+esm1?arch=source&distro=esm-apps/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.16.4-0ubuntu1

3.18.1-1ubuntu1

3.18.2-0ubuntu1

3.18.2-0ubuntu2

3.18.3-3ubuntu1

3.18.4-0ubuntu1

3.18.4-0ubuntu2

3.18.4-0ubuntu3

3.18.5-0ubuntu0.1

3.18.5-0ubuntu0.2

3.18.5-0ubuntu0.3

3.18.5-0ubuntu0.3+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "gnome-shell",
            "binary_version": "3.18.5-0ubuntu0.3+esm1"
        },
        {
            "binary_name": "gnome-shell-common",
            "binary_version": "3.18.5-0ubuntu0.3+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3982.json"