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Improper Authentication The advisory has been revoked - it doesn't affect any version of package kernel-cross-headers  (opens in a new tab)

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EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-RHEL8-KERNELCROSSHEADERS-4261295
  • published4 Jan 2022
  • disclosed12 Sept 2021
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Introduced: 12 Sep 2021

CVE-2021-4197  (opens in a new tab)
CWE-287  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by RHEL.

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.