http://wccftech.com/android-september-security-bulletin/

Google has released the September 2017 Android security bulletin with general information about the vulnerabilities affecting Android devices.

Factory images and OTAs for the month will probably take care of all the said vulnerabilities, but they are only available for Nexus 9 on Android 7.1.1. For now, Google has not added Android 8.0 Oreo images and OTAs with September patch for Nexus and Pixel devices, but we can expect that to be updated soon.