CVE-2020-3898: Apple Mac OS X

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Catalina 10.15.4. An application may be able to gain elevated privileges.

Affected products

• Apple Mac OS X: before 10.15.4 (fixed in 10.15.4)

Published 2020-10-22. Last modified 2026-06-17.