To see what patches have been applied to your kernel, you can use the following command kcarectl --patch-info.
You will see something like this:
OS: centos6
kernel: kernel-2.6.32-431.17.1.el6
time: 2014-05-14 09:33:03
uname: 2.6.32-431.17.1.el6.x86_64
kpatch-name: 2.6.32/n_tty-fix-n_tty_write-crash-when-echoing-in-raw-mode.patch
kpatch-description: n_tty: Fix n_tty_write crash when echoing in raw mode
kpatch-kernel: >kernel-2.6.32-431.17.1.el6
kpatch-cve: CVE-2014-0196
kpatch-cvss: 6.9
kpatch-cve-url: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-0196
kpatch-patch-url: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/?id=4291086b1f081b869c6d79e5b7441633dc3ace00