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.
Published 2022-03-23 20:15:10
Updated 2023-05-16 10:59:50
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: BypassGain privilege

Threat overview for CVE-2021-4197

Top countries where our scanners detected CVE-2021-4197
Top open port discovered on systems with this issue 49152
IPs affected by CVE-2021-4197 932,607
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-4197!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-4197

Probability of exploitation activity in the next 30 days: 0.04%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 8 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-4197

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.2
HIGH AV:L/AC:L/Au:N/C:C/I:C/A:C
3.9
10.0
NIST
7.8
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
NIST

CWE ids for CVE-2021-4197

  • When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
    Assigned by:
    • nvd@nist.gov (Primary)
    • secalert@redhat.com (Secondary)

References for CVE-2021-4197

Products affected by CVE-2021-4197

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