What is CVE-2021-4148?

CVE-2021-4148 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2021-4148 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-4148?

CVE-2021-4148 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-2021-4148?

No patch is currently available for CVE-2021-4148. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-4148 actively exploited?

CVE-2021-4148 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-4148

Medium

A vulnerability was found in the Linux kernel's block_invalidatepage in fs/buffer.c in the filesystem. A missing sanity check may allow a local attacker with user privilege to cause a denial of service (DOS) problem.

Package Linux Kernel

Published 2022-03-23

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-354

CVE-2021-4148 is classified as CWE-354

See CWE-354 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-4148 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=2026487

Issue Tracking Third Party Advisory
Kernel patch commit
https://lkml.org/lkml/2021/9/12/323
Patch
Kernel patch commit
https://lkml.org/lkml/2021/9/17/1037
Patch

Details

CVE ID CVE-2021-4148

Severity Medium

CVSS score 5.5 / 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-2021-4148?

CVE-2021-4148 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2021-4148 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-4148?

CVE-2021-4148 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-2021-4148?

No patch is currently available for CVE-2021-4148. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-4148 actively exploited?

No — CVE-2021-4148 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.