The cp2112_gpio_direction_input function in drivers/hid/hid-cp2112.c in the Linux kernel 4.9.x before 4.9.9 does not have the expected EIO error status for a zero-length report, which allows local users to have an unspecified impact via unknown vectors.
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.9
www.openwall.com/lists/oss-security/2017/04/16/4
www.securityfocus.com/bid/98010
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8e9faa15469ed7c7467423db4c62aeed3ff4cae3
github.com/torvalds/linux/commit/8e9faa15469ed7c7467423db4c62aeed3ff4cae3