CVE-2019-8665: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

A denial of service issue was addressed with improved validation. This issue is fixed in iOS 12.4, watchOS 5.3. A remote attacker may cause an unexpected application termination.

Affected products

• Apple iPhone OS: before 12.4 (fixed in 12.4)
• Apple watchOS: before 5.3 (fixed in 5.3)

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