This vulnerability stems from an integer overflow in Apple iOS and iPadOS that could be exploited by a malicious application to escape its sandbox environment. The sandbox is a critical security boundary designed to isolate apps and restrict their access to system resources and user data. The integer overflow was mitigated by improved input validation. The fix is included in iOS 26.6 and iPadOS 26.6, along with updates to macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, and watchOS 26.6. The CVSS v3.1 base score is 8.6, indicating high severity, with attack vector local, low attack complexity, no privileges required, user interaction required, scope changed, and high impact on confidentiality, integrity, and availability.

A successful exploit could allow a malicious app to break out of its sandbox, potentially gaining unauthorized access to system resources and user data beyond its intended permissions. This could lead to full compromise of the affected device's confidentiality, integrity, and availability. There are no reports of active exploitation in the wild.

This vulnerability has been fixed by Apple in iOS 26.6 and iPadOS 26.6. Users and administrators should apply these updates promptly to mitigate the risk. No additional mitigation steps are indicated by the vendor advisory.