CVE-2023-42916: Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability

Medium severity, CVSS 6.5. Actively exploited: in CISA KEV since 2023-12-04. EPSS: 17.8% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may disclose sensitive information. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.

Affected products

• Apple iPadOS: before 15.8.1 (fixed in 15.8.1); from 16.0, before 16.7.3 (fixed in 16.7.3); from 17.0, before 17.1.2 (fixed in 17.1.2)
• Apple iPhone OS: before 15.8.1 (fixed in 15.8.1); from 16.0, before 16.7.3 (fixed in 16.7.3); from 17.0, before 17.1.2 (fixed in 17.1.2)
• Apple macOS: from 14.0, before 14.1.2 (fixed in 14.1.2)
• Apple Safari: before 17.1.2 (fixed in 17.1.2)
• Debian Debian Linux: version 11.0 only; version 12.0 only
• Fedoraproject Fedora: version 38 only; version 39 only
• WebKitGTK Webkitgtk+: before 2.42.3 (fixed in 2.42.3)

Published 2023-11-30. Last modified 2026-06-17.