CVE-2026-65407 in iOS
Summary
by MITRE • 09/15/2026
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 26.6 and iPadOS 26.6, iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.6, macOS Tahoe 26.7, tvOS 26.6, tvOS 27, visionOS 26.6, visionOS 27, watchOS 26.6, watchOS 27. An app may be able to cause unexpected system termination.
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Analysis
by VulDB Data Team • 09/15/2026
The disclosed vulnerability represents a critical memory management flaw classified as a use-after-free condition within the core operating systems of Apple's ecosystem. This type of error occurs when software continues to reference a block of memory after it has been freed or deallocated by the system. In this specific instance, improved memory management protocols were implemented to ensure that pointers are properly invalidated and that access checks are enforced before any operation is attempted on previously released resources. The flaw allows an application to exploit this timing gap, leading to undefined behavior within the kernel or critical system services. Such vulnerabilities are typically categorized under CWE-416 in the Common Weakness Enumeration framework, which highlights the danger of referencing memory after it has been freed, a common root cause for both stability issues and potential security breaches.
The operational impact of this vulnerability is primarily characterized by instability rather than immediate remote code execution, although the latter remains a theoretical risk depending on how the corrupted memory state is manipulated. As noted in the advisory, an app may be able to cause unexpected system termination. This manifests as crashes or denial-of-service conditions where critical processes fail unexpectedly, disrupting user experience and potentially affecting device reliability. While the immediate symptom is system termination, use-after-free bugs are historically significant because they can often be chained with other vulnerabilities to achieve arbitrary code execution if an attacker can control the data written into the freed memory region before it is reallocated for a different purpose. The fix addresses this by ensuring that the lifecycle of allocated objects is strictly managed and that any attempt to access them post-deallocation results in a safe failure rather than exploitable corruption.
Mitigation strategies focus heavily on timely patching, as Apple has released updates across multiple platforms including iOS 26.6 through 27, iPadOS 26.6 through 27, macOS Sequoia 15.8 and Tahoe variants, tvOS 26.6 and 27, visionOS 26.6 and 27, and watchOS 26.6 and 27. Administrators and end-users should prioritize applying these updates to close the window of exposure. From a defensive development perspective, this incident reinforces the importance of adopting memory-safe programming practices or utilizing static analysis tools that can detect dangling pointer references during the code review phase. Furthermore, runtime protections such as Address Sanitizers in debug builds and hardware-enforced data execution prevention policies provide additional layers of defense against exploitation attempts. Security teams should monitor for any indicators of compromise related to process crashes or abnormal memory usage patterns that might suggest an attempt to leverage this flaw before patches are fully deployed across all devices.