CVE-2020-9930: Apple Mac OS X

High severity, CVSS 7.1. EPSS: 0.2% 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 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. A local user may be able to cause unexpected system termination or read kernel memory.

Affected products

• Apple Mac OS X: before 10.13.6 (fixed in 10.13.6); from 10.14, before 10.14.6 (fixed in 10.14.6); from 10.15, before 10.15.6 (fixed in 10.15.6); version 10.13.6 only; version 10.14.6 only

Published 2021-04-02. Last modified 2026-06-17.