Is it possible to manually patch Stagefright? Is it possible to manually patch the Stagefright vulnerability?

It looks like the latest OTA update that patches Stagefright also blocks many common avenues for rooting. Obviously, root + vulnerabilty = really bad. Is there some utility or console method of replacing, updating or disabling the affected media modules? If not: Why must I be so dependent on the manufacturer?
Yes but It's a lot easier to install CM for monthly security updates;

https://wiki.cyanogenmod.org/w/Main_Page