An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Catalina 10.15.7, Security Update 2020-005 High Sierra, Security Update 2020-005 Mojave, iOS 14.0 and iPadOS 14.0. Processing a maliciously crafted USD file may lead to unexpected application termination or arbitrary code execution.
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1104
https://support.apple.com/en-us/HT211850
https://support.apple.com/en-us/HT211849