Just like it’s big brother, Apple has released a security update to patch the Spectra vulnerability on Intel’s chip architecture. The iOS 11.2.2 update is available for download as long as your device is eligible by going to the Setting app. To access the update, go to Settings –> General –> Software Update.
The update fixes what the Apple developer they think is the most treat at the moment, the Safari browser. You should expect future updates later as the vulnerability is a serious case affecting Apple and other similar companies.