Apple has released updates for iOS/iPadOS, macOS, and watchOS that primarily address bugs and security vulnerabilities.
iOS 15.3.1 is a minor update, functionality wise, for most users. It fixes an issue with braille displays and fixes an arbitrary code execution vulnerability.
Apple’s iOS update notes are as follows:
iOS 15.3.1 provides important security updates for your iPhone and fixes an issue that could cause braille displays to become unresponsive.
In addition, Apple has published information about the security updates on its support website:
Available for: iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation)
Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Description: A use after free issue was addressed through improved memory management.
CVE-2022-22620: An Anonymous Investigator
Meanwhile, macOS Monterey 12.2.1 primarily fixes a bug that could cause Macs to drain battery unexpectedly. Here are the update notes:
macOS 12.2.1 provides important security updates and fixes an issue for Intel-based Mac computers that could cause battery drain during sleep when connected to Bluetooth peripherals.
The bug got some press attention a few weeks ago, with users claiming that their MacBook batteries would run low even if the laptops were in sleep mode and not being used.
The behavior occurred because Bluetooth accessories repeatedly woke Macs they were synced to, but Apple says it has resolved the issue with this update. macOS 12.2.1 also fixes the same WebKit issue as iOS 15.3.1.
Apple also released watchOS 8.4.2 for the Apple Watch today, but simply says the update fixes bugs and provides security updates without going into further detail.
All of these updates are now available for supported devices. They come about two weeks after Apple released iOS 15.3, watchOS 8.4, and macOS 12.2, which also focused on bug fixes and security updates.