#VU61258 Security restrictions bypass in Linux kernel

Published: 2022-03-11

Vulnerability identifier: #VU61258

Vulnerability risk: Low


CVE-ID: CVE-2021-4197


Exploitation vector: Local

Exploit availability:

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system



The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to missing permissions checks within the cgroups (control groups) functionality of Linux Kernel when writing into a file descriptor. A local low privileged process can trick a higher privileged parent process into writing arbitrary data into files, which can result in denial of service or privileges escalation.

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Vulnerable software versions

External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

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