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CVE-2021-46920

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback Current code blindly writes over the SWERR and the OVERFLOW…

Published Feb 27, 2024EPSS 0.22%

Overview

CVE-2021-46920 is a medium-severity vulnerability. It was published on February 27, 2024 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

In the Linux kernel, the following vulnerability has been resolved:

dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback

Current code blindly writes over the SWERR and the OVERFLOW bits. Write

back the bits actually read instead so the driver avoids clobbering the

OVERFLOW bit that comes after the register is read.

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

Refgit.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8Refgit.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553dRefgit.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7fRefgit.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8Refgit.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553dRefgit.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f

How CyberStrike helps

Frequently asked questions

What is CVE-2021-46920?

CVE-2021-46920 is a medium-severity vulnerability. It was published on February 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-46920?

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-2021-46920?

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-2021-46920?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-46920 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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