What is CVE-2021-4154?

CVE-2021-4154 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2021-4154 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-4154?

CVE-2021-4154 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2021-4154?

No patch is currently available for CVE-2021-4154. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-4154 actively exploited?

CVE-2021-4154 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2021-4154

High

A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.

Package Linux Kernel

Published 2022-02-04

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2021-4154 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-4154 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Cloud
https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002

Third Party Advisory
Security
https://security.netapp.com/advisory/ntap-20220225-0004/

Third Party Advisory
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=2034514
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7ef281c35a7a4ae33e93ee2bc9975b
Patch

Details

CVE ID CVE-2021-4154

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2022-02-04

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-4154?

CVE-2021-4154 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2021-4154 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-4154?

CVE-2021-4154 has a CVSS score of 8.8 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:C/C:H/I:H/A:H.
Is there a patch available for CVE-2021-4154?

No patch is currently available for CVE-2021-4154. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-4154 actively exploited?

No — CVE-2021-4154 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →