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, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A local attacker may be able to elevate their privileges.
No PoCs from references.
- https://github.com/b1n4r1b01/n-days
- https://github.com/houjingyi233/macOS-iOS-system-security