Here is a patched tarball of the grsecurity 2.6.22.9 fixed against the new vmslice exploit. This is the last known kernel to work with CSF as they have not updated it yet to work with 2.6.23 and up, With this new patch it should be secure as grsecurity normally is
64 bit
http://nix101.com/kernels/linux-2.6.22.9-grsec-x86_64-fixed-vmslice.tar.gz
32 bit
http://nix101.com/kernels/linux-2.6.22.9-grsec-i686-fixed-vmslice.tar.gz
I dont guarantee anything [...]