CyanogenMod has rolled out stable builds for about 50 handsets and is including the October security fixes that Google released this week for Nexus devices. For Android users concerned about easily exploited bugs like Stagefright 1.0 and 2.0, it seems that the fastest way to get critical security updates is to replace the device's existing firmware with CyanogenMod.

So far, the only devices that have received Google's October Android security update, which carries fixes for dozens of critical vulnerabilities including Stagefright 2.0, are Nexus devices. The fixes are also included in Android Marshmallow 6.0, but again that's only available to Nexus devices for now.