Since 042stab084.12:

    Selected security fixes backported from 2.6.32-431.1.2.el6 kernel (CVE-2013-2141, CVE-2013-4470)

[edit] See also

    RHSA-2013-1801 - http://j.mp/18t6e2B
    CVE-2013-2141 - http://j.mp/1o0KJ0O
    CVE-2013-4470 - http://j.mp/1o0KNgP