The cx231xx_usb_probe function in drivers/media/usb/cx231xx/cx231xx-cards.c in the Linux kernel through 4.13.11 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted USB device.
https://usn.ubuntu.com/3754-1/
https://usn.ubuntu.com/3619-2/
https://usn.ubuntu.com/3619-1/
https://patchwork.kernel.org/patch/9963527/
https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
https://groups.google.com/d/msg/syzkaller/WlUAVfDvpRk/1V1xuEA4AgAJ