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 usbdev from the businterface for dev_xxx messages.
Previously businterface was checked for NULL only in the functions directly calling usbfillbulkurb or usbcontrolmsg.
Check for valid bus_interface on all interface entry points and return -ENODEV if it is NULL.