As soon as the StageFright vulnerability started making headlines the CyanogenMod team got busy patching the vuln in all their nightlies. They rolled out the patch in nightlies for CM12.1 first. Today they announced that patches have been rolled out in nightlies for versions of CyanogenMod 10.1-12.1. They went a step further and patched up all exploits and vulns that were exposed during blackhat/defcon. If you are running Cyanogenmod you will want to be sure to grab the latest update as soon as possible.
via cyanogenmod