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[Launchpad Bug Tracker <2043733@xxxxxxxxxxxxxxxxxx>]

*** This bug is a security vulnerability ***

You have been subscribed to a private security bug by Jesse M Darnley (jmdarn):

Anything that changes the state of the internal microphone on the HP
Zbook 17 G6 can result in a hard crash of the entire system. This
includes things like noise reduction being applied by Google Meets, but
it can be reliably replicated by just changing the volume of the
microphone until the system crashes. When the crashes occur, the logs
cut off just as they would if the system's power were completely cut.

This behavior only occurs with the internal microphone. External
microphones (both 3.5 mm TRRS and USB microphones) do not exhibit this
same behavior.

This behavior has been tested on 20.04, 22.04, 23.04, and 23.10 and
reliably occurs on kernels 5.4, 5.15, 6.2, and 6.5.

This is the system device that should be responsible for handling the
internal microphone.

description: Multimedia audio controller
             product: Cannon Lake PCH cAVS
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             logical name: card0
             logical name: /dev/snd/controlC0
             logical name: /dev/snd/hwC0D0
             logical name: /dev/snd/hwC0D2
             logical name: /dev/snd/pcmC0D0c
             logical name: /dev/snd/pcmC0D0p
             logical name: /dev/snd/pcmC0D31p
             logical name: /dev/snd/pcmC0D3p
             logical name: /dev/snd/pcmC0D4p
             logical name: /dev/snd/pcmC0D5p
             logical name: /dev/snd/pcmC0D6c
             logical name: /dev/snd/pcmC0D7c
             version: 10
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=sof-audio-pci-intel-cnl latency=64
             resources: iomemory:400-3ff iomemory:400-3ff irq:191 memory:404a108000-404a10bfff memory:404a000000-404a0fffff

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

-- 
HP Zbook 17 G6 internal microphone causes hard crashes
https://bugs.launchpad.net/bugs/2043733
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