What is CVE-2021-4197?

CVE-2021-4197 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10. CVE-2021-4197 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-4197?

CVE-2021-4197 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-4197?

No patch is currently available for CVE-2021-4197. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-4197 actively exploited?

CVE-2021-4197 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-4197

High

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.

Package Linux Kernel

Published 2022-03-23

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-287

CVE-2021-4197 is classified as CWE-287

See CWE-287 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-4197 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2035652

Issue Tracking Third Party Advisory
Kernel.org
https://lore.kernel.org/lkml/20211209214707.805617-1-tj%40kernel.org/T/
Security
https://security.netapp.com/advisory/ntap-20220602-0006/

Third Party Advisory
Debian Security
https://www.debian.org/security/2022/dsa-5127

Third Party Advisory
Debian Security
https://www.debian.org/security/2022/dsa-5173

Third Party Advisory
Oracle
https://www.oracle.com/security-alerts/cpujul2022.html

Third Party Advisory

Details

CVE ID CVE-2021-4197

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2022-03-23

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-4197?

CVE-2021-4197 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2021-4197 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-4197?

CVE-2021-4197 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-4197?

No patch is currently available for CVE-2021-4197. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-4197 actively exploited?

No — CVE-2021-4197 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.