What is CVE-2021-47502?

CVE-2021-47502 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.6 onward and patched in 5.10.85, 5.15.8 and 5.16. CVE-2021-47502 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47502?

CVE-2021-47502 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47502?

Yes, CVE-2021-47502 has been patched. Fixed versions include 5.10.85, 5.15.8 and 5.16. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47502 actively exploited?

CVE-2021-47502 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47502

Medium

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.

Package Linux Kernel

Published 2024-05-24

Last modified 2025-09-29

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.6 and later are affected. Fixed in 5.10.85, 5.15.8, 5.16 and their respective stable series.

Affected from

≥ 5.6

Fixed in

✓ 5.10.85 5.10.x ✓ 5.15.8 5.15.x ✓ 5.16

References

3 total

Kernel Git
https://git.kernel.org/stable/c/1089dac26c6b4b833323ae6c0ceab29fb30ede72

Patch
Kernel Git
https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101

Patch
Kernel Git
https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1

Patch

Details

CVE ID CVE-2021-47502

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-24

Modified 2025-09-29

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47502?

CVE-2021-47502 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.6 onward and has been patched in 5.10.85, 5.15.8 and 5.16. CVE-2021-47502 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47502?

CVE-2021-47502 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47502?

Yes. CVE-2021-47502 has been patched. Fixed versions include 5.10.85, 5.15.8 and 5.16. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47502 actively exploited?

No. CVE-2021-47502 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.