CVE-2019-8555: Apple Mac OS X

High severity, CVSS 7.8. EPSS: 1.3% chance of exploitation in the next 30 days.

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Mojave 10.14.4. A malicious application may be able to execute arbitrary code with kernel privileges.

Affected products

• Apple Mac OS X: before 10.4.4 (fixed in 10.4.4)

Published 2019-12-18. Last modified 2026-06-17.