CVE-2018-4404: Apple iPhone OS

High severity, CVSS 8.8. EPSS: 14% chance of exploitation in the next 30 days.

In iOS before 11.4 and macOS High Sierra before 10.13.5, a memory corruption issue exists and was addressed with improved memory handling.

Affected products

• Apple iPhone OS: before 11.4 (fixed in 11.4)
• Apple Mac OS X: from 10.13.0, before 10.13.5 (fixed in 10.13.5)

Published 2019-01-11. Last modified 2026-06-17.