An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Ventura 13.3, iOS 15.7.4 and iPadOS 15.7.4, macOS Monterey 12.6.4, macOS Big Sur 11.7.5. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.
Apple Security Advisory 2023-03-27-2 - iOS 15.7.4 and iPadOS 15.7.4 addresses code execution, out of bounds read, out of bounds write, and use-after-free vulnerabilities.