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CVE-2021-47286

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Validate channel ID when processing command completions MHI reads the channel ID from the event ring element se…

Published May 21, 2024CWE-787EPSS 0.23%

Overview

CVE-2021-47286 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

bus: mhi: core: Validate channel ID when processing command completions

MHI reads the channel ID from the event ring element sent by the

device which can be any value between 0 and 255. In order to

prevent any out of bound accesses, add a check against the maximum

number of channels supported by the controller and those channels

not configured yet so as to skip processing of that event ring

element.

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/3efec3b4b16fc7af25676a94230a8ab2a3bb867cRefgit.kernel.org/stable/c/546362a9ef2ef40b57c6605f14e88ced507f8dd0Refgit.kernel.org/stable/c/aed4f5b51aba41e2afd7cfda20a0571a6a67dfe9Refgit.kernel.org/stable/c/3efec3b4b16fc7af25676a94230a8ab2a3bb867cRefgit.kernel.org/stable/c/546362a9ef2ef40b57c6605f14e88ced507f8dd0Refgit.kernel.org/stable/c/aed4f5b51aba41e2afd7cfda20a0571a6a67dfe9

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47286?

CVE-2021-47286 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47286?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47286?

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-2021-47286?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47286 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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