Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-47502

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
24/05/2024
Last modified:
29/09/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ASoC: codecs: wcd934x: handle channel mappping list correctly<br /> <br /> Currently each channel is added as list to dai channel list, however<br /> there is danger of adding same channel to multiple dai channel list<br /> which endups corrupting the other list where its already added.<br /> <br /> This patch ensures that the channel is actually free before adding to<br /> the dai channel list and also ensures that the channel is on the list<br /> before deleting it.<br /> <br /> This check was missing previously, and we did not hit this issue as<br /> we were testing very simple usecases with sequence of amixer commands.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.6 (including) 5.10.85 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.8 (excluding)
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools