CVE-2019-8516: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

A validation issue was addressed with improved logic. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, tvOS 12.2, watchOS 5.2. Processing a maliciously crafted string may lead to a denial of service.

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.