CVE-2019-8527: Apple iPhone OS

Critical severity, CVSS 9.1. EPSS: 3.2% chance of exploitation in the next 30 days.

A buffer overflow was addressed with improved size validation. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, tvOS 12.2, watchOS 5.2. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

Affected products

• Apple iPhone OS: before 12.2 (fixed in 12.2)
• Apple Mac OS X: before 10.14.4 (fixed in 10.14.4)
• Apple tvOS: before 12.2 (fixed in 12.2)
• Apple watchOS: before 5.2 (fixed in 5.2)

Published 2019-12-18. Last modified 2026-06-17.