CVE-2019-8744: Apple iPhone OS

Medium severity, CVSS 5.5. EPSS: 0.9% chance of exploitation in the next 30 days.

A memory corruption issue existed in the handling of IPv6 packets. This issue was addressed with improved memory management. This issue is fixed in macOS Catalina 10.15, tvOS 13, macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006, watchOS 6, iOS 13. A malicious application may be able to determine kernel memory layout.

Affected products

• Apple iPhone OS: before 13.1 (fixed in 13.1)
• Apple Mac OS X: before 10.15 (fixed in 10.15)
• Apple tvOS: before 13 (fixed in 13)
• Apple watchOS: before 6.0 (fixed in 6.0)

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