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CVE-2021-47374

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: dma-debug: prevent an error message from causing runtime problems For some drivers, that use the DMA API.

Published May 21, 2024CWE-770EPSS 0.51%

Overview

CVE-2021-47374 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

dma-debug: prevent an error message from causing runtime problems

For some drivers, that use the DMA API. This error message can be reached

several millions of times per second, causing spam to the kernel's printk

buffer and bringing the CPU usage up to 100% (so, it should be rate

limited). However, since there is at least one driver that is in the

mainline and suffers from the error condition, it is more useful to

err_printk() here instead of just rate limiting the error message (in hopes

that it will make it easier for other drivers that suffer from this issue

to be spotted).

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/510e1a724ab1bf38150be2c1acabb303f98d0047Refgit.kernel.org/stable/c/de4afec2d2946c92c62a15ab341c70b287289e6aRefgit.kernel.org/stable/c/510e1a724ab1bf38150be2c1acabb303f98d0047Refgit.kernel.org/stable/c/de4afec2d2946c92c62a15ab341c70b287289e6a

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47374?

CVE-2021-47374 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-47374?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-47374?

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-2021-47374?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47374 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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