CVE-2018-4448: Apple iPhone OS

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra, iOS 12.1.1, watchOS 5.1.2, macOS Mojave 10.14.2, Security Update 2018-003 High Sierra, Security Update 2018-006 Sierra, tvOS 12.1.1. A local user may be able to read kernel memory.

Affected products

• Apple iPhone OS: before 12.1.1 (fixed in 12.1.1)
• Apple Mac OS X: from 10.12.6, before 10.14.4 (fixed in 10.14.4); from 10.13.6, before 10.14.2 (fixed in 10.14.2)
• Apple tvOS: before 12.1.1 (fixed in 12.1.1)
• Apple watchOS: before 5.1.2 (fixed in 5.1.2)

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