I'm using LinuxMint 13 (KDE) still with Kernel 3.2.0-23.
For Ubuntu 12.4 LTS as base of LinuxMint 13 there have been some Kernel updates for security reasons. Currently they are using Kernel 3.2.0-38 http://www.ubuntu.com/usn/usn-1741-1/
Why don't I get a "more secure" Kernel for LinuxMint 13 ?
I've activated "main, upstream and import" packages, NOT: backport, romeo and sources.
UpdateManager shows me packages of the levels 1,2,3, no unsecure or dangerous/unstable packages.
In my opinion these settings are defaults.
Kernel updates havn't been shown to me yet.
I've got no problem with the current kernel, except that it might be unsecure.