CVE-2020-9939: Apple Mac OS X

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

This issue was addressed with improved checks. This issue is fixed in macOS Catalina 10.15.6. A local user may be able to load unsigned kernel extensions.

Affected products

• Apple Mac OS X: before 10.15.6 (fixed in 10.15.6)

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