An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.2 Security Update 2021-001 Catalina Security Update 2021-001 Mojave tvOS 14.3 macOS Big Sur 11.1 Security Update 2020-001 Catalina Security Update 2020-007 Mojave iOS 14.3 and iPadOS 14.3 watchOS 7.2. A remote attacker may be able to leak memory.