drivers/hid/hid-sensor-hub.c in the Human Interface Device (HID) subsystem in the Linux kernel through 3.11, when CONFIG_HID_SENSOR_HUB is enabled, allows physically proximate attackers to obtain sensitive information from kernel memory via a crafted device.
http://marc.info/?l=linux-input&m=137772191114645&w=1
http://openwall.com/lists/oss-security/2013/08/28/13