The dgnc_mgmt_ioctl function in drivers/staging/dgnc/dgnc_mgmt.c in the Linux kernel through 4.3.3 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel memory via a crafted application.
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4b6184336ebb5c8dc1eae7f7ab46ee608a748b05
www.openwall.com/lists/oss-security/2015/10/21/8
www.securityfocus.com/bid/77317
www.securitytracker.com/id/1034896
www.ubuntu.com/usn/USN-2841-1
www.ubuntu.com/usn/USN-2841-2
www.ubuntu.com/usn/USN-2842-1
www.ubuntu.com/usn/USN-2842-2
www.ubuntu.com/usn/USN-2843-1
www.ubuntu.com/usn/USN-2843-2
www.ubuntu.com/usn/USN-2843-3
www.ubuntu.com/usn/USN-2844-1
bugzilla.redhat.com/show_bug.cgi?id=1274728
github.com/torvalds/linux/commit/4b6184336ebb5c8dc1eae7f7ab46ee608a748b05