A use after free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.3, iOS 16.4 and iPadOS 16.4, iOS 15.7.4 and iPadOS 15.7.4, tvOS 16.4, watchOS 9.4. An app may be able to execute arbitrary code with kernel privileges.
Apple Security Advisory 2023-03-27-6 - tvOS 16.4 addresses bypass, code execution, integer overflow, out of bounds read, and use-after-free vulnerabilities.