Back in December, a critical vulnerability was discovered with Safari 15 that would’ve leaked out information related to the user and his/her activities on the internet to others. Turns out Apple has released a minor update to fix the issue aka the iOS 15.3.1 for iPhones and iPadOS 15.3.1 on iPads.
Apart from that, the update resolves vulnerabilities with iCloud and ColorSync among other Apple services as detailed by the support page on Apple’s website.
The minor iOS 15.3.1 is available for iPhone *S and above along with iPod Touch (7th Gen). The iPadOS 15.3.1, on the other hand, is available for iPad (5th Gen), iPad Mini 4, iPad Air 2, and iPad Pro (all the models) for free and ready to download right away. Both iPhone or iPad users can go to the Settings app on their devices, proceed to General >> Software Updates and once the update is available, hit the Install Now button and that will do the needful.
There’s also WatchOS 8.4 that Apple is seeding on Apple Watches so they can go to Settings >> General >> Software Update >> Install Now to get their hands on this minor update as well. macOS Monteray 12.2.1 has been released on Mac devices as well fixing a few issues including the one with Bluetooth battery draining.