CVE-2021-47502

ASoC: codecs: wcd934x: handle channel mappping list correctly

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.

N/A

CVSS

Severity:

EPSS 0.07%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/1089dac26c6b4b833323ae6c0ceab29fb30ede72
https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1
https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101

Frequently Asked Questions

What is the severity of CVE-2021-47502?: CVE-2021-47502 has not yet been assigned a CVSS score.
How to fix CVE-2021-47502?: To fix CVE-2021-47502, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47502 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47502 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47502?: CVE-2021-47502 affects Linux Linux, Linux Linux.

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