CVE-2020-9918: Apple Mac OS X

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

Affected products

• Apple Mac OS X: before 10.15.6 (fixed in 10.15.6)
• Apple tvOS: before 13.4.8 (fixed in 13.4.8)
• Apple watchOS: before 6.2.8 (fixed in 6.2.8)

Published 2020-10-16. Last modified 2026-06-17.