CVE-2020-3853: 
macOS vulnerability analysis and mitigation

A type confusion vulnerability (CVE-2020-3853) was discovered in Apple's kernel component, affecting iOS 13.3.1, iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, and watchOS 6.1.2. The vulnerability was discovered by Brandon Azad of Google Project Zero and was addressed by Apple in January 2020 through improved memory handling (Apple Support, Apple macOS).

The vulnerability is a type confusion issue in the kernel that was addressed with improved memory handling. Type confusion vulnerabilities occur when a program accesses a resource using a type that is incompatible with the actual type of that resource, potentially leading to memory corruption (CVE Details).

If exploited, this vulnerability could allow a malicious application to execute arbitrary code with system privileges, effectively gaining complete control over the affected device (Apple Support).

Apple has released security updates to address this vulnerability in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, and watchOS 6.1.2. Users are advised to update their devices to these versions or later to protect against this vulnerability (Apple Support).