A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15, tvOS 12.3, watchOS 5.2.1, tvOS 13, macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006, macOS Mojave 10.14.5, Security Update 2019-003 High Sierra, Security Update 2019-003 Sierra, iOS 12.3, iOS 13. Playing a malicious audio file may lead to arbitrary code execution.