net/dccp/ccid.h in the Linux kernel before 3.5.4 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) by leveraging the CAP_NET_ADMIN capability for a certain (1) sender or (2) receiver getsockopt call.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=276bdb82dedb290511467a5a4fdbe9f0b52dce6f
rhn.redhat.com/errata/RHSA-2013-0744.html
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.5.4
www.openwall.com/lists/oss-security/2013/03/07/2
bugzilla.redhat.com/show_bug.cgi?id=919164
github.com/torvalds/linux/commit/276bdb82dedb290511467a5a4fdbe9f0b52dce6f