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CVE-2021-4197

Public on 2022-02-09
Modified on 2022-03-07
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.

Severity
Medium
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CVSS v3 Base Score
6.3
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2022-03-07 23:19 ALAS-2022-1571
Amazon Linux 2 - Core kernel 2022-03-07 23:32 ALAS2-2022-1761
Amazon Linux 2 - Kernel-5.10 Extra kernel 2022-03-07 23:46 ALAS2KERNEL-5.10-2022-011
Amazon Linux 2 - Kernel-5.4 Extra kernel 2022-03-07 23:47 ALAS2KERNEL-5.4-2022-023

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.3 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C