CVE-2021-47502

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxdd9eb19b567303e4b92747dcfb5deedb182af111 < 1089dac26c6b4b833323ae6c0ceab29fb30ede72affected
LinuxLinuxdd9eb19b567303e4b92747dcfb5deedb182af111 < 339ffb5b56005582aacc860524d2d208604049d1affected
LinuxLinuxdd9eb19b567303e4b92747dcfb5deedb182af111 < 23ba28616d3063bd4c4953598ed5e439ca891101affected
LinuxLinux5.6affected
LinuxLinux0 < 5.6unaffected
LinuxLinux5.10.85 <= 5.10.*unaffected
LinuxLinux5.15.8 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References