About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
Released December 10, 2019
Available for: macOS Mojave 10.14.4 and later
Impact: Compiling with untrusted sources may lead to arbitrary code execution with user privileges
Description: An out-of-bounds read was addressed with improved bounds checking.
CVE-2019-8840: Pan ZhenPeng (@Peterpan0927) of Qihoo 360 Nirvan Team
We would like to acknowledge an anonymous researcher for their assistance.