I need to find a list of security vulnerabilities that have been fixed
in the Linux kernel since Kernel 2.6.6.  I am only interested in
Kernel vulnerabilities, not in any of the associated software (glibc,
apache, etc).  I have already downloaded the ChangeLogs from
kernel.org, but they include all changes and I am really only
interested in changes that were to fix security problems.  I have
looked at cert.org but I am not confident that is a complete listing
of kernel vulnerabilities.

You can visit http://securityfocus.com/vulnerabilities, then select
"Linux" as Vendor and "Kernel" as title, now you can select a version
number, and a list of  vulnerabilities of that version.
regards

Thanks the Security Focus thing worked pretty well.