VULNERABILITY INTELLIGENCE

CVE-2021-4197

CVSS score7.8 HIGH
EPSS probability0.54%
CISA KEVNot currently listed
Published2022-03-23
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.

Weakness classification

  • secalert@redhat.com: CWE-287
  • nvd@nist.gov: CWE-287

Primary references