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CVE-2021-4150

5.5 · MEDIUM

A use-after-free flaw was found in the add_partition in block/partitions/core.c in the Linux kernel.

Published Mar 23, 2022CWE-416EPSS 0.34%

Overview

CVE-2021-4150 is a medium-severity vulnerability. It was published on March 23, 2022 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A use-after-free flaw was found in the add_partition in block/partitions/core.c in the Linux kernel. A local attacker with user privileges could cause a denial of service on the system. The issue results from the lack of code cleanup when device_add call fails when adding a partition to the disk.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugzilla.redhat.com/show_bug.cgi?id=2025938Reflkml.org/lkml/2021/10/18/485Reflkml.org/lkml/2021/9/6/781Refbugzilla.redhat.com/show_bug.cgi?id=2025938Reflkml.org/lkml/2021/10/18/485Reflkml.org/lkml/2021/9/6/781

How CyberStrike helps

Frequently asked questions

What is CVE-2021-4150?

CVE-2021-4150 is a medium-severity vulnerability. It was published on March 23, 2022 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-4150?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-4150?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-4150?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-4150 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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