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Apple has released iOS 15.3.1, iPadOS 15.3.1, watchOS 8.4.2, and macOS 12.2.1 with bug fixes and security fixes, including a patch for a flaw that may have been actively exploited.
The release notes of each operating system note the usual bug fixes and performance enhancements that come with minor releases. Though, iOS 15.3.1 also includes a fix for Braille displays that may stop responding. Users can wait to be prompted to update, or check out Software Update in the Settings app.
The build number for iOS 15.3 and iPadOS 15.3 is 19D52, up from 19D50. The build number for watchOS 8.4.2 is 19S553, up from 19S550. The build number for macOS 12.2.1 is 21D62, up from 21D49.