If I select the VM, then Settings -> USB and I try to add a filter, a tooltip is displayed: However, when running VirtualBox, no USB device is actually detected ( Enable USB Controller is obviously checked). they are in the list outputted by the lsusb command. I've been trying with a USB flash drive and a Garmin sports watch: when connected to the host, they are both recognised by the system, i.e. Guest: Windows 7, with VirtualBox Guest Additions installed.Host: VirtualBox 5.0.0 r101573 on Ubuntu 14.04, with Oracle VM.
As a result, the guest OS is not able to see any USB device either. Oracle VirtualBox is unable to list/filter the USB devices attached to my system.