This page contains the available monthly Pixel Update Bulletins. These bulletins were previously known as the Pixel / Nexus security bulletins. These bulletins supplement the Android Security Bulletins with additional security patches and functional improvements on supported Google Pixel and Nexus devices (Google devices).
Google devices start receiving OTA updates on the same day the monthly bulletin is released. In general, it takes about one and a half calendar weeks for the OTA to reach every Google device. The Google device firmware images are available on the Google Developer site.
Patches listed in the Pixel Update bulletins can come from various sources, including: the Android Open Source Project (AOSP), the upstream Linux kernel, and system-on-chip (SOC) manufacturers. Android platform fixes are merged into AOSP 24–48 hours after the Pixel Update Bulletin is released.