CVE-2019-8511: Apple iPhone OS

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, watchOS 5.2. A malicious application may be able to elevate privileges.

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 watchOS: before 5.2 (fixed in 5.2)

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