QEMU: usb: out-of-bounds r/w access issue while processing usb packets

An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU. This issue occurs while processing USB packets from a guest when USBDevice 'setuplen' exceeds its 'databuf4096' in the dotokenin, dotokenout routines. This flaw allows a guest user to crash the QEMU process,...