Apple operating systems contain a flaw in memory handling that is triggered when the system processes certain files. This flaw can cause memory corruption, potentially allowing an attacker to execute arbitrary code or cause a system crash. The vulnerability represents a classic buffer overflow type of weakness that compromises system integrity.

Apple iOS, iPadOS, and macOS Sequoia are affected. The issue is fixed in iOS 18.6, iPadOS 18.6, and macOS Sequoia 15.6. Devices running earlier versions of these operating systems remain vulnerable.

The CVSS score is not provided, so the quantitative severity is unknown. The lack of a public exploit and absence from the KEV catalog suggest no known widespread exploitation yet. The likely attack vector is local file‑based, requiring an attacker to supply a specially crafted file or manipulate a user into opening one. If the vulnerability is triggered, memory corruption could lead to arbitrary code execution or a denial of service.