The __request_module function in kernel/kmod.c in the Linux kernel before 3.4 does not set a certain killable attribute, which allows local users to cause a denial of service (memory consumption) via a crafted application.
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
http://rhn.redhat.com/errata/RHSA-2013-0223.html
http://rhn.redhat.com/errata/RHSA-2013-1348.html
https://bugzilla.redhat.com/show_bug.cgi?id=853474
http://secunia.com/advisories/55077
http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.4.tar.bz2