In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: avoid kobject path lookup in DualSense match

The DualSense jack-detection input handler verifies that a matching input
device belongs to the same physical controller by building kobject path
strings for both the input device and the USB audio device, then comparing
the path prefix.

This was observed when a weak physical connection caused the controller
to rapidly disconnect and reconnect. During that repeated hotplug,
snd_dualsense_ih_match() can run while the controller's USB device is
being disconnected. kobject_get_path() walks ancestor kobjects and
dereferences their names; if the USB device kobject name is no longer
valid, this can fault in strlen():

  RIP: 0010:strlen+0x10/0x30
  Call Trace:
   kobject_get_path+0x34/0x150
   snd_dualsense_ih_match+0x49/0xd0 [snd_usb_audio]
   input_register_device+0x566/0x6a0
   ps_probe+0xb89/0x1590 [hid_playstation]

The same ownership check can be done without building kobject path
strings. The input device is parented below the HID device, USB interface
and USB device, so walking the input device parent chain and comparing
against the mixer USB device preserves the check without dereferencing
kobject names during disconnect.

https://git.kernel.org/stable/c/4246dd043b7a4f8e3bc1d2896e81d11220610eda

https://git.kernel.org/stable/c/4566bf8ae9dbfe81bdc2ff1702d59db8a233b06e

https://git.kernel.org/stable/c/662a1d7b5affc424ea4f4bc20dd99be29e687886

https://git.kernel.org/stable/c/7693c0cc415f3a16a7a3355f245474a5e661be4e

https://git.kernel.org/stable/c/a263eb12cbe2e208e6e637df0f9b0be9a484158e

https://git.kernel.org/stable/c/a47ecd904c51ae6a42957feb3cf2f4266adee2e5

https://git.kernel.org/stable/c/c1da6d3f45036fa63672ee04ad97cb526b40b987

https://git.kernel.org/stable/c/e4c66a149c408e44e60bfec3fabf08b6b7abbc60

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