A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1 watchOS 7.1 iOS 12.4.9 watchOS 6.2.9 Security Update 2020-006 High Sierra Security Update 2020-006 Mojave iOS 14.2 and iPadOS 14.2 watchOS 5.3.9 macOS Catalina 10.15.7 Supplemental Update macOS Catalina 10.15.7 Update. Processing a maliciously crafted font may lead to arbitrary code execution.