Google has now started rolling out the March Android security update for compatible Pixel and Nexus models. The new update is designed for devices, including Pixel 2, Pixel 2 XL, Pixel, Pixel XL, Pixel C, Nexus 5X, and Nexus 6P. It resolves a total of 37 issues as well as includes improvements specifically for the Pixel 2 and Pixel 2 XL models. Alongside its availability in the form of an over-the-air (OTA) rollout, Google has released factory images and OTA zip files of the latest Android update.
You can check the availability of the March Android security update on your eligible Pixel or Nexus device by going to Settings > System updates. Alternatively, there are OTA zip files that can be installed on devices with an unlocked bootloader. OTA zip files can also be sideloaded on top of the existing software version. This mainly helps to retain user data. However, if you're a pro, you can pick the updated factory images. You are recommended to back up your data before installing the update via a factory image.
As per the Android Security Bulletin for the month of March, there are 16 issues resolved in the March security update patch level dated 2018-03-01, while the 2018-03-05 patch level addresses 21 issues. Vulnerabilities range from high to critical, and the most severe is related to the media framework that could allow a remote attacker to execute arbitrary code through a "crafted file". Importantly, Google notes that there are no reports of any active customer exploitation or abuse of the newly reported issues.
In addition to the general security enhancements, the Pixel 2 and Pixel 2 XL have received improved screen wake performance with fingerprint unlock as well as improved crash reporting. Moreover, the Pixel 2 XL has improved audio performance when recording videos.