The proc_connectinfo function in drivers/usb/core/devio.c in the Linux kernel through 4.6 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted USBDEVFS_CONNECTINFO ioctl call.
Exploitability
AV:LAC:LPR:NUI:NScope
S:UImpact
C:HI:NA:N6.2/CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N