According to a user on Reddit, the security patch update includes various fixes related to adaptive brightness, Bluetooth routing, and media player notification.
This is not the first time Google has rolled out an update for a Pixel device a few months after it reached its end-of-life.
It typically rolls out a minor bug-fixing update a few months after support ends.
Google has listed the Pixel 5a's November OTA and factory image for download on its site.
Pixel 5a users can manually upgrade their phone using the OTA instructions.
To update a device using one of the OTA images below, you need the latest adb tool. You can get it from the Android SDK Platform-Tools package, which you can download here.
Don't forget to either add adb to your PATH environment variable or change into the directory containing the executable.
Also be certain that you've set up USB access for your device, as described in Run Apps on a Hardware Device.
You can find the full list of
FOUR NEW PIXELS LAUNCHED
It's the first time the Pro model of the Pixel has come in two different sizes, a which is 6.3-inches and a at 6.8-inches.
Google was forced to reveal images of the fresh Pixel line-up early after a number of leaks.
This includes a new "camera bar" bulge along the back to house the lens and flash light.
But at a launch event yesterday, Android fans got a full view and look at all the new features.
The devices are brighter, more powerful and pack improved batteries, according to Google.