Google has started to roll out September Android Security update to its Pixel and Nexus line of smartphones. For all supported Google devices, security patch levels will be 2018-09-05.
The Update brings the fixes for 59 vulnerabilities and improves the Retail Mode battery charge for the Pixel 2 and Pixel 2 XL. The update also improves Software Version Reporting, and the audio quality over car speakers when using a Bluetooth connection for all four current Pixel models.
Google Device owners can manually check for the update through Settings-> About Phone-> Software update. The Google device firmware images can be downloaded from the Google Developer site.