What is CVE-2021-4218?

CVE-2021-4218 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2021-4218 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-4218?

CVE-2021-4218 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-4218?

No patch is currently available for CVE-2021-4218. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-4218 actively exploited?

CVE-2021-4218 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-4218

Medium

A flaw was found in the Linux kernel’s implementation of reading the SVC RDMA counters. Reading the counter sysctl panics the system. This flaw allows a local attacker with local access to cause a denial of service while the system reboots. The issue is specific to CentOS/RHEL.

Package Linux Kernel

Published 2022-08-24

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-665

CVE-2021-4218 is classified as CWE-665

See CWE-665 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-4218 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://access.redhat.com/security/cve/CVE-2021-4218

Third Party Advisory
Bugs
https://bugs.centos.org/view.php?id=18395

Exploit Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2048359

Issue Tracking Third Party Advisory

Details

CVE ID CVE-2021-4218

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2022-08-24

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-4218?

CVE-2021-4218 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2021-4218 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-4218?

CVE-2021-4218 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-4218?

No patch is currently available for CVE-2021-4218. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-4218 actively exploited?

No — CVE-2021-4218 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.