CVE-2026-64692 in iOS
Summary
by MITRE • 07/27/2026
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause a denial-of-service.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a classic out-of-bounds read condition that was successfully addressed through enhanced bounds checking mechanisms within Apple's operating systems. The flaw occurred when an application attempted to access memory locations beyond the allocated buffer boundaries, creating potential pathways for system instability and operational disruption. Such issues typically arise from insufficient input validation or improper boundary calculations during memory operations, allowing malicious or flawed applications to exploit these gaps in memory management protocols.
The technical nature of this vulnerability aligns with common software security weaknesses documented under CWE-129, which specifically addresses insufficient bounds checking in input validation scenarios. When an application fails to properly verify array indices or buffer limits, it creates opportunities for attackers to manipulate memory access patterns and potentially execute unauthorized operations. The fix implemented by Apple involved strengthening the bounds checking routines that monitor memory access attempts, ensuring that all buffer operations remain within valid memory boundaries before permitting data retrieval or manipulation.
The operational impact of this vulnerability extends beyond simple denial-of-service conditions, as it represents a foundational security weakness that could potentially be leveraged for more sophisticated attacks. While the immediate risk manifests as system instability and service disruption, the underlying flaw suggests broader memory management vulnerabilities that could be exploited in combination with other techniques. This type of vulnerability commonly falls within ATT&CK framework's T1499 category, specifically addressing "Toggle Execution Mode" and related denial-of-service tactics that can disrupt normal system operations.
Apple's resolution demonstrates a comprehensive approach to addressing this memory safety issue across their entire ecosystem, with patches released for multiple operating system versions including iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, and watchOS 26.6. The coordinated release across all platforms indicates that this vulnerability was considered significant enough to warrant immediate attention across Apple's entire software portfolio. Organizations should prioritize updating these systems to ensure protection against potential exploitation attempts that could lead to unauthorized access or service disruption. The implementation of improved bounds checking serves as a critical defensive measure that prevents applications from accessing memory regions they should not be permitted to reach, thereby strengthening overall system integrity and resilience against memory-based attacks.
This vulnerability highlights the importance of rigorous input validation and boundary checking in software development practices, particularly in operating systems where applications have extensive access to system resources. The fix addresses a fundamental security principle that should be implemented across all software components to prevent unauthorized memory access patterns and maintain system stability under various operational conditions.