CVE-2018-4394: Apple iPhone OS

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

A memory corruption issue was addressed with improved input validation. This issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, tvOS 12.1, watchOS 5.1, iTunes 12.9.1.

Affected products

• Apple iPhone OS: before 12.1 (fixed in 12.1)
• Apple iTunes: before 12.9.1 (fixed in 12.9.1)
• Apple Mac OS X: before 10.14.1 (fixed in 10.14.1)
• Apple tvOS: before 12.1 (fixed in 12.1)
• Apple watchOS: before 5.1 (fixed in 5.1)

Published 2019-04-03. Last modified 2026-06-17.