Apple has released iOS 15.6, bringing bug fixes, security updates, and small enhancements to the operating system.
Most notable is a resolution to an issue where the Settings app may erroneously state that the storage is full, despite having storage available.
Additionally, there are new options to pause, rewind, and restart live sports games in the TV app, and bug fixes for braille devices when using Mail, and a fix for a Safari problem where tabs may revert back to previous pages.
iOS 15.6 Security Fixes
iOS 15.6 also brings 36 security fixes, including flaws that allow malicious apps to execute arbitrary code with kernel privileges.
APFS
Impact: An app with root privileges may be able to execute arbitrary code with kernel privileges
Description: The issue was addressed with improved memory handling.
AppleAVD
Impact: A remote user may be able to cause kernel code execution
Description: A buffer overflow was addressed with improved bounds checking.
Impact: An app may be able to disclose kernel memory
Description: The issue was addressed with improved memory handling.
AppleMobileFileIntegrity
Impact: An app may be able to gain root privileges
Description: An authorization issue was addressed with improved state management.
Apple Neural Engine
Impact: An app may be able to break out of its sandbox
Description: This issue was addressed with improved checks.
Impact: An app may be able to execute arbitrary code with kernel privileges
Description: This issue was addressed with improved checks.
Impact: An app may be able to execute arbitrary code with kernel privileges
Description: The issue was addressed with improved memory handling.
Audio
Impact: An app may be able to execute arbitrary code with kernel privileges
Description: An out-of-bounds write issue was addressed with improved input validation.
Impact: An app may be able to disclose kernel memory
Description: The issue was addressed with improved memory handling.
CoreMedia
Impact: An app may be able to disclose kernel memory
Description: The issue was addressed with improved memory handling.
CoreText
Impact: A remote user may cause an unexpected app termination or arbitrary code execution
Description: The issue was addressed with improved bounds checks.
File System Events
Impact: An app may be able to gain root privileges
Description: A logic issue was addressed with improved state management.
GPU Drivers
Impact: An app may be able to disclose kernel memory
Description: Multiple out-of-bounds write issues were addressed with improved bounds checking.
Impact: An app may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed with improved validation.
Home
Impact: A user may be able to view restricted content from the lock screen
Description: A logic issue was addressed with improved state management.
iCloud Photo Library
Impact: An app may be able to access sensitive user information
Description: An information disclosure issue was addressed by removing the vulnerable code.
ICU
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: An out-of-bounds write issue was addressed with improved bounds checking.
ImageIO
Impact: Processing a maliciously crafted image may result in disclosure of process memory
Description: The issue was addressed with improved memory handling.
Impact: Processing a maliciously crafted file may lead to arbitrary code execution
Description: A logic issue was addressed with improved checks.
Impact: Processing a maliciously crafted image may lead to disclosure of user information
Description: An out-of-bounds read issue was addressed with improved bounds checking.
Impact: Processing an image may lead to a denial-of-service
Description: A null pointer dereference was addressed with improved validation.
IOMobileFrameBuffer
Impact: An application may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed with improved state management.
Kernel
Impact: An app with root privileges may be able to execute arbitrary code with kernel privileges
Description: The issue was addressed with improved memory handling.
Impact: An app may be able to disclose kernel memory
Description: An out-of-bounds read issue was addressed with improved bounds checking.
Impact: An app with arbitrary kernel read and write capability may be able to bypass Pointer Authentication
Description: A logic issue was addressed with improved state management.
Impact: An app with arbitrary kernel read and write capability may be able to bypass Pointer Authentication
Description: A race condition was addressed with improved state handling.
Liblouis
Impact: An app may cause unexpected app termination or arbitrary code execution
Description: This issue was addressed with improved checks.
libxml2
Impact: An app may be able to leak sensitive user information
Description: A memory initialization issue was addressed with improved memory handling.
Multi-Touch
Impact: An app may be able to execute arbitrary code with kernel privileges
Description: A type confusion issue was addressed with improved state handling.
PluginKit
Impact: An app may be able to read arbitrary files
Description: A logic issue was addressed with improved state management.
Safari Extensions
Impact: Visiting a maliciously crafted website may leak sensitive data
Description: The issue was addressed with improved UI handling.
Software Update
Impact: A user in a privileged network position can track a user’s activity
Description: This issue was addressed by using HTTPS when sending information over the network.
WebKit
Impact: Visiting a website that frames malicious content may lead to UI spoofing
Description: The issue was addressed with improved UI handling.
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: An out-of-bounds write issue was addressed with improved input validation.
WebRTC
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A memory corruption issue was addressed with improved state management.
Wi-Fi
Impact: An app may be able to cause unexpected system termination or write kernel memory
Description: This issue was addressed with improved checks.
Impact: A remote user may be able to cause unexpected system termination or corrupt kernel memory
Description: This issue was addressed with improved checks.
iOS 15.6 Availability
iOS 15.6 is 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)
You can download the update by opening the Settings app and going to General > Software Update.
