A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.4 and iPadOS 15.4, Security Update 2022-003 Catalina, macOS Monterey 12.3, macOS Big Sur 11.6.5. A malicious application may be able to execute arbitrary code with kernel privileges.
CWE-787 - Out-of-Bounds Write
Out-of-bounds write vulnerability is a memory access bug that allows software to write data past the end or before the beginning of the intended buffer. This may result in the corruption of data, a crash, or arbitrary code execution.