CVE-2021-4197

CVE Details

Release Date:	2022-03-23
Impact:	None	What is this?

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.

See more information about CVE-2021-4197 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.8
Vector String:	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2022-9479	2022-06-14
Oracle Linux version 7 (kernel-uek-container)	ELSA-2022-9480	2022-06-14
Oracle Linux version 8 (kernel)	ELSA-2022-1988	2022-05-17
Oracle Linux version 8 (kernel-uek)	ELSA-2022-9479	2022-06-14
Oracle Linux version 8 (kernel-uek-container)	ELSA-2022-9480	2022-06-14