Google will provide fixes to this Stagefright hole to latest Nexus devices starting next week. It is also already patched in CyanogenMod CM12.0 and 12.1 nightlies and in SilentCircles Blackphone.
For other Android phones you can follow these CVE's:
CVE-2015-1538
CVE-2015-1539
CVE-2015-3824
CVE-2015-3826
CVE-2015-3827
CVE-2015-3828
CVE-2015-3829