This is a heads up for 6.7 so nothing to do just yet. There are now hardened config fragments in the upstream sources (see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=befaa609f4c784f505c02ea3ff036adf4f4aa814). This was first mentioned at https://lore.kernel.org/linux-hardening/20230825050618.never.197-kees@kernel.org/. (CCing kernel@ as there might be something to do for the hardening options there, not sure yet)