CVE-2021-30844: Apple Mac OS X

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

A logic issue was addressed with improved state management. This issue is fixed in Security Update 2021-005 Catalina, macOS Big Sur 11.6. A remote attacker may be able to leak memory.

Affected products

• Apple Mac OS X: from 10.15, up to and including 10.15.6; version 10.15.7 only
• Apple macOS: before 11.6.1 (fixed in 11.6.1)

Published 2021-10-19. Last modified 2026-06-17.