Check rules under /etc/udev/rules.d/, uncomment the last 2 lines:
[multiple1902 rules.d]$ pwd
/etc/udev/rules.d
[multiple1902 rules.d]$ cat 60-vboxdrv.rules
KERNEL=="vboxdrv", NAME="vboxdrv", OWNER="root", GROUP="root", MODE="0600"
#these two lines give access permission to vboxusers to properly work with usb nodes, this could be security risk (bnc#664520) !!
#
SUBSYSTEM=="usb_device",ATTR{devnum}=="?*",ATTR{busnum}=="?*",SYMLINK+="vboxusb/$attr{busnum}/$attr{devnum}",RUN+="/usr/bin/setfacl -m g:vboxusers:6 /dev/vboxusb/$attr{busnum}/$attr{devnum}"
SUBSYSTEM=="usb",ENV{DEVTYPE}=="usb_device",ATTR{devnum}=="?*",ATTR{busnum}=="?*",SYMLINK+="vboxusb/$attr{busnum}/$attr{devnum}",RUN+="/usr/bin/setfacl -m g:vboxusers:6 /dev/vboxusb/$attr{busnum}/$attr{devnum}"