CVE-2018-4381: Apple iPhone OS

Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days.

A resource exhaustion issue was addressed with improved input validation. This issue is fixed in tvOS 12.1, iOS 12.1. Processing a maliciously crafted message may lead to a denial of service.

Affected products

• Apple iPhone OS: before 12.1 (fixed in 12.1)
• Apple tvOS: before 12.1 (fixed in 12.1)

Published 2020-10-27. Last modified 2026-06-17.