The issue was addressed with improved memory handling. This issue is fixed in iOS 15.7.1 and iPadOS 15.7.1, tvOS 16.1, iOS 16.1 and iPadOS 16, macOS Ventura 13. Processing a maliciously crafted USD file may disclose memory contents.
https://support.apple.com/en-us/HT213490
https://support.apple.com/en-us/HT213489