An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, macOS Golden Gate 27. Processing a maliciously crafted image may lead to unexpected app termination.
https://www.infosecurity-magazine.com/news/apple-patches-coregraphics-zero/
https://support.apple.com/en-us/149041