CVE-2021-47502

2024-05-2415:15:10

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

asoc

wcd934x

vulnerability

resolved

channel mapping

list

patch

dai channel

corruption

missing check

nvd

6.8 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.6%

JSON

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.

Affected configurations

Vulners

Node

linuxlinux_kernelRange5.6–5.10.85

linuxlinux_kernelRange5.11.0–5.15.8

linuxlinux_kernelRange5.16.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "sound/soc/codecs/wcd934x.c"
    ],
    "versions": [
      {
        "version": "a70d9245759a",
        "lessThan": "1089dac26c6b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a70d9245759a",
        "lessThan": "339ffb5b5600",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a70d9245759a",
        "lessThan": "23ba28616d30",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "sound/soc/codecs/wcd934x.c"
    ],
    "versions": [
      {
        "version": "5.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.6",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.85",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.8",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]