# CVE-2021-47502: linux: In the Linux kernel, the following vulnerability has been resolved:  ASoC: codecs: wcd934x: handle channel mappping l...

CVE-2021-47502 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47502, released May 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47502
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 24, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.15-1 | [DEBIAN-CVE-2021-47502](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47502.md) | May 24, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.15.15-1 | [DEBIAN-CVE-2021-47502](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47502.md) | May 24, 2024 |
| Linux | linux Debian 14 | 5.15.15-1 | [DEBIAN-CVE-2021-47502](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47502.md) | May 24, 2024 |

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