The ipc_rcu_putref function in ipc/util.c in the Linux kernel before 3.10 does not properly manage a reference count, which allows local users to cause a denial of service (memory consumption or system crash) via a crafted application.
http://lists.opensuse.org/opensuse-updates/2014-02/msg00045.html
http://rhn.redhat.com/errata/RHSA-2014-0285.html
http://rhn.redhat.com/errata/RHSA-2015-0284.html
http://www.openwall.com/lists/oss-security/2013/10/30/4
https://bugzilla.redhat.com/show_bug.cgi?id=1024854
https://github.com/torvalds/linux/commit/6062a8dc0517bce23e3c2f7d2fea5e22411269a3