CVE-2020-9779: Apple Mac OS X

High severity, CVSS 7.1. EPSS: 0.3% 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 10.15.4. A local user may be able to cause unexpected system termination or read kernel memory.

Affected products

• Apple Mac OS X: from 10.13.6, before 10.15.4 (fixed in 10.15.4)

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