CVE-2020-3847: Apple Mac OS X

Critical severity, CVSS 9.8. EPSS: 2.2% 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 10.15.3. A remote attacker may be able to leak memory.

Affected products

• Apple Mac OS X: before 10.15.3 (fixed in 10.15.3)

Published 2020-04-01. Last modified 2026-06-17.