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CVE-2021-47502

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: wcd934x: handle channel mappping list correctly Currently each channel is added as list to dai channel list, howe…

Published May 24, 2024EPSS 0.24%

Overview

CVE-2021-47502 is a high-severity vulnerability. It was published on May 24, 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:

ASoC: codecs: wcd934x: handle channel mappping list correctly

Currently each channel is added as list to dai channel list, however

there is danger of adding same channel to multiple dai channel list

which endups corrupting the other list where its already added.

This patch ensures that the channel is actually free before adding to

the dai channel list and also ensures that the channel is on the list

before deleting it.

This check was missing previously, and we did not hit this issue as

we were testing very simple usecases with sequence of amixer commands.

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/1089dac26c6b4b833323ae6c0ceab29fb30ede72Refgit.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101Refgit.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1Refgit.kernel.org/stable/c/1089dac26c6b4b833323ae6c0ceab29fb30ede72Refgit.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101Refgit.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47502?

CVE-2021-47502 is a high-severity vulnerability. It was published on May 24, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47502?

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-2021-47502?

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-2021-47502?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47502 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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