CVE-2026-64775 in iOS
Summary
by MITRE • 07/28/2026
A memory initialization issue was addressed with improved memory handling. 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 unexpected system termination.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a memory initialization flaw that was resolved through enhanced memory management protocols in multiple Apple operating system versions. The issue stems from inadequate handling of memory allocation during application execution, creating potential pathways for system instability. When an application fails to properly initialize memory segments, it can trigger cascading failures that lead to unexpected termination of critical system processes. This type of vulnerability falls under the broader category of memory safety issues that have been extensively documented in cybersecurity literature and commonly associated with CWE-459 which addresses incomplete cleanup of resources.
The technical implementation of this flaw likely involves scenarios where applications attempt to access or manipulate memory regions before they have been properly initialized, potentially leading to undefined behavior patterns. Such conditions can manifest when an application requests memory allocation without proper validation of the initialization state, or when memory management routines fail to properly establish the required memory context for subsequent operations. The vulnerability's exploitation potential increases when multiple applications interact with shared memory spaces or when system-level processes attempt to utilize improperly initialized memory segments.
From an operational perspective, this vulnerability presents significant risks to system stability and user experience across all affected Apple platforms. The potential for unexpected system termination creates opportunities for denial-of-service conditions that could disrupt normal computing operations, particularly in environments where continuous system availability is critical. Attackers might leverage this weakness to develop malicious applications designed specifically to trigger the memory initialization failure, potentially leading to system crashes or forced reboots that could be exploited for more sophisticated attacks.
The mitigation strategies implemented in the updated operating system versions focus primarily on strengthening memory management routines and improving resource initialization protocols. These improvements likely include enhanced validation checks during memory allocation processes, better tracking of memory state transitions, and more robust error handling mechanisms that prevent applications from causing system-wide failures through improper memory usage. The fix addresses the root cause by ensuring that all memory segments are properly initialized before being accessed by applications or system processes, thereby preventing the conditions that previously led to unexpected termination events.
Security professionals should consider this vulnerability in the context of broader attack surface management frameworks, particularly when evaluating potential exploitation vectors within Apple ecosystems. The remediation efforts align with industry best practices for memory safety and follow established patterns outlined in various cybersecurity standards and threat modeling methodologies. Organizations implementing these updates should monitor for any persistent issues related to application compatibility or system performance following deployment, as memory management improvements can sometimes introduce unexpected interactions with legacy applications or specialized software environments that may have relied on the previous memory handling behaviors.