CVE-2018-4363: Apple iPhone OS

Medium severity, CVSS 5.5. EPSS: 1% chance of exploitation in the next 30 days.

An input validation issue existed in the kernel. This issue was addressed with improved input validation. This issue affected versions prior to iOS 12, tvOS 12, watchOS 5.

Affected products

• Apple iPhone OS: before 12.0 (fixed in 12.0)
• Apple tvOS: before 12 (fixed in 12)
• Apple watchOS: before 5.0 (fixed in 5.0)

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