About the security content of iOS 16.3.1 and iPadOS 16.3.1

This document describes the security content of iOS 16.3.1 and iPadOS 16.3.1.

About Apple security updates

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Apple security documents reference vulnerabilities by CVE-ID when possible.

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iOS 16.3.1 and iPadOS 16.3.1

Released February 13, 2023

Kernel

Available for: iPhone 8 and later, iPad Pro (all models), iPad Air 3rd generation and later, iPad 5th generation and later, and iPad mini 5th generation and later

Impact: An app may be able to execute arbitrary code with kernel privileges

Description: A use after free issue was addressed with improved memory management.

CVE-2023-23514: Xinru Chi of Pangu Lab, Ned Williamson of Google Project Zero

Security

Available for: iPhone 8 and later, iPad Pro (all models), iPad Air 3rd generation and later, iPad 5th generation and later, iPad mini 5th generation and later

Impact: Processing a maliciously crafted certificate may lead to a denial-of-service

Description: A denial-of-service issue was addressed with improved input validation.

CVE-2023-23524: David Benjamin of Google Chrome

Entry added February 20, 2023

WebKit

Available for: iPhone 8 and later, iPad Pro (all models), iPad Air 3rd generation and later, iPad 5th generation and later, iPad mini 5th generation and later

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 type confusion issue was addressed with improved checks.

WebKit Bugzilla: 251944

CVE-2023-23529: an anonymous researcher

Additional recognition

We would like to acknowledge The Citizen Lab at The University of Toronto’s Munk School for their assistance.

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Published Date: October 31, 2023