CVE-2026-65343 in iOS
Summary
by MITRE • 08/18/2026
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. A remote attacker may be able to cause unexpected system termination.
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Analysis
by VulDB Data Team • 08/18/2026
The vulnerability described constitutes a use-after-free error, a critical class of memory safety issues that arise when software continues to reference a pointer after the memory it points to has been deallocated or freed. In this specific instance, the flaw was addressed through improved memory management practices within the affected operating systems. This type of defect typically occurs when an object is destroyed while one or more pointers to it are still active and accessible by other parts of the program. When these dangling pointers are subsequently dereferenced, they access invalid or uninitialized memory regions, leading to undefined behavior that can compromise system stability and security integrity.
From a technical perspective, use-after-free vulnerabilities often stem from complex reference counting errors, race conditions in multi-threaded environments, or improper lifecycle management of objects within the application logic. The operational impact highlighted by Apple indicates that a remote attacker could exploit this flaw to cause unexpected system termination. This suggests that the vulnerability allows for denial-of-service attacks where an adversary can trigger memory corruption leading to crashes in critical system processes. While immediate exploitation might result primarily in service disruption, such vulnerabilities are frequently precursors to more severe outcomes like arbitrary code execution if the corrupted memory state is manipulated further through heap spraying or other advanced techniques.
This issue aligns with Common Weakness Enumeration identifier CWE-416, which specifically defines use after free as a situation where an application uses a pointer that references deallocated memory. In terms of adversarial tactics and techniques, this vulnerability relates to the ATT&CK framework under the category of Defense Evasion or Impact, particularly involving system availability disruption through resource exhaustion or crash induction. The ability for a remote attacker to trigger these conditions underscores the importance of robust input validation and strict adherence to safe coding standards that prevent access to freed memory blocks.
Mitigation strategies primarily involve applying the provided software updates which contain the necessary patches to iOS 26.6.1, iPadOS 26.6.1, and macOS Tahoe 26.6.2. These updates implement stricter checks during object lifecycle management to ensure that pointers are nullified or invalidated immediately upon deallocation, thereby preventing subsequent access attempts from succeeding. For organizations managing fleets of these devices, it is imperative to prioritize the deployment of these patches to close the window of opportunity for potential exploitation. Additionally, developers should adopt static analysis tools and memory sanitizers during the software development lifecycle to detect such issues before they reach production environments, ensuring that memory management protocols are rigorously enforced across all application components.