CVE-2019-8547: Apple iPhone OS

Critical severity, CVSS 9.8. EPSS: 2.3% chance of exploitation in the next 30 days.

An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Mojave 10.14.5, Security Update 2019-003 High Sierra, Security Update 2019-003 Sierra, watchOS 5.2, macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra, iOS 12.2. A remote attacker may be able to leak memory.

Affected products

• Apple iPhone OS: before 12.2 (fixed in 12.2)
• Apple Mac OS X: from 10.12.6, before 10.14.5 (fixed in 10.14.5); from 10.14.3, before 10.14.4 (fixed in 10.14.4)
• Apple watchOS: before 5.2 (fixed in 5.2)

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