Android 5.1.1 LMY48I factory image for Nexus 6, Nexus 9 WiFi/LTE, Nexus 10, Nexus 4, Nexus 5, Nexus 7 2013 WiFi models.
After pushing out the AOSP build of Android 5.1.1 LMY48I, Google makes factory image of the new build officially available for download. This factory image is available for Nexus 6, Nexus 9 WiFi, Nexus 9 LTE, Nexus 10, Nexus 4, Nexus 5, Nexus 7 2013 WiFi models.
This latest build of LMY48I over the material design fixes the Stagefright vulnerabilities. The same over the air update will be rolling out very soon and will be region wise roll out.
If you haven't got the Android 5.1.1 LMY48I OTA update then grab the factory image from the links below.