kernel-rt is vulnerable to arbitrary code execution. The vulnerability exists through a format string attack in the input of printk.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8d0c2d10dd72c5292eda7a06231056a4c972e4cc
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8d0c2d10dd72c5292eda7a06231056a4c972e4cc
lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
rhn.redhat.com/errata/RHSA-2013-0928.html
rhn.redhat.com/errata/RHSA-2013-1026.html
rhn.redhat.com/errata/RHSA-2013-1051.html
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.4
www.mandriva.com/security/advisories?name=MDVSA-2013:176
www.openwall.com/lists/oss-security/2013/03/20/8
www.ubuntu.com/usn/USN-1809-1
www.ubuntu.com/usn/USN-1811-1
www.ubuntu.com/usn/USN-1812-1
www.ubuntu.com/usn/USN-1813-1
www.ubuntu.com/usn/USN-1814-1
access.redhat.com/security/updates/classification/#important
access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_MRG/2/html/Technical_Notes/RHSA-2013-0829.html
access.redhat.com/site/solutions/373743
bugzilla.redhat.com/show_bug.cgi?id=918098
bugzilla.redhat.com/show_bug.cgi?id=920783
bugzilla.redhat.com/show_bug.cgi?id=927026
github.com/torvalds/linux/commit/8d0c2d10dd72c5292eda7a06231056a4c972e4cc
rhn.redhat.com/errata/RHBA-2012-0044.html
rhn.redhat.com/errata/RHSA-2013-0829.html