CVE-2026-28973

Apple · iOS, iPadOS, macOS, watchOS

An integer overflow vulnerability in Apple operating systems allows a malicious application to potentially escape its sandbox.

Executive summary

A critical integer overflow vulnerability affecting multiple Apple operating systems may permit a malicious application to escape its sandbox and achieve unauthorized system access.

Vulnerability

This vulnerability involves an integer overflow flaw that occurs due to insufficient input validation, which can be leveraged by a malicious application to break out of its security sandbox. The attack requires user interaction and is triggered locally, placing the attacker in a position to bypass system isolation controls.

Business impact

The ability for a malicious application to escape its sandbox represents a significant security breach, as it undermines the primary isolation mechanism of Apple devices. With a CVSS score of 8.6, this high severity flaw could lead to full system compromise, unauthorized data access, and the potential execution of arbitrary code with elevated privileges.

Remediation

Immediate Action: Update all affected iOS, iPadOS, macOS, and watchOS devices to the latest patched versions provided by Apple to resolve the integer overflow.

Proactive Monitoring: Monitor system logs for unusual application behavior or unexpected process requests that indicate a potential sandbox breakout attempt.

Compensating Controls: Enforce strict application management policies and ensure users only install software from trusted sources, such as the official App Store, to minimize the risk of executing malicious code.

Exploitation status

Public Exploit Available: No

Analyst recommendation

Given the high CVSS score and the nature of sandbox escape vulnerabilities, immediate patching is essential to maintain system integrity. Administrators should prioritize deploying these updates across all managed Apple devices to prevent potential exploitation.