net/rds/sysctl.c in the Linux kernel before 3.19 uses an incorrect data type in a sysctl table, which allows local users to obtain potentially sensitive information from kernel memory or possibly have unspecified other impact by accessing a sysctl entry.
https://github.com/torvalds/linux/commit/db27ebb111e9f69efece08e4cb6a34ff980f8896
https://bugzilla.redhat.com/show_bug.cgi?id=1195355
http://www.ubuntu.com/usn/USN-2565-1
http://www.ubuntu.com/usn/USN-2564-1
http://www.ubuntu.com/usn/USN-2563-1
http://www.ubuntu.com/usn/USN-2562-1
http://www.ubuntu.com/usn/USN-2561-1
http://www.ubuntu.com/usn/USN-2560-1
http://www.securityfocus.com/bid/72730
http://www.openwall.com/lists/oss-security/2015/02/20/20
http://www.debian.org/security/2015/dsa-3237
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00004.html