Apple released a security patch for CVE-2025-43300, addressing an out-of-bounds write vulnerability in the ImageIO framework that could be exploited in zero-click attacks. The article provides a detailed root cause analysis of the vulnerability and the changes made in the patch, focusing on the modifications in the RawCamera file and the implications for image processing. Researchers have previously explored the vulnerability, revealing its connections to JPEG Lossless compression in DNG files.