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CentOS Linux: CVE-2021-4197: Important: kernel-rt security and bug fix update (Multiple Advisories)

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CentOS Linux: CVE-2021-4197: Important: kernel-rt security and bug fix update (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
03/23/2022
Created
05/14/2022
Added
05/13/2022
Modified
05/25/2023

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.

Solution(s)

  • centos-upgrade-kernel
  • centos-upgrade-kernel-rt

References

  • DSA-5127
  • DSA-5173
  • CVE-2021-4197

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