An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iCloud for Windows 7.12 tvOS 12.3 iTunes 12.9.5 for Windows macOS Mojave 10.14.5 Security Update 2019-003 High Sierra Security Update 2019-003 Sierra iOS 12.3. Processing a maliciously crafted font may result in the disclosure of process memory.