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

staging: gpib: Fix Oops after disconnect in agilent usb

If the agilent usb dongle is disconnected subsequent calls to the
driver cause a NULL dereference Oops as the bus_interface
is set to NULL on disconnect.

This problem was introduced by setting usb_dev from the bus_interface
for dev_xxx messages.

Previously bus_interface was checked for NULL only in the functions
directly calling usb_fill_bulk_urb or usb_control_msg.

Check for valid bus_interface on all interface entry points
and return -ENODEV if it is NULL.

https://git.kernel.org/stable/c/50ef6e45bec79da4c5a01fad4dc23466ba255099

https://git.kernel.org/stable/c/8491e73a5223acb0a4b4d78c3f8b96aa9c5e774d

https://git.kernel.org/stable/c/e88633705078f40391a9afc6cc8ea3025e6f692b