CVE-2026-64693 in iOS
Summary
by MITRE • 07/28/2026
A type confusion issue was addressed with improved checks. 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. Processing a maliciously crafted image may lead to a denial-of-service.
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Analysis
by VulDB Data Team • 07/28/2026
Type confusion vulnerabilities represent a critical class of software defects that occur when a program incorrectly handles data types during execution, often leading to unpredictable behavior and potential exploitation. This particular vulnerability stems from insufficient type validation mechanisms within Apple's image processing libraries, where the system fails to properly verify data type consistency when handling malformed image files. The issue manifests when the operating system attempts to process specially crafted image data that contains contradictory or unexpected type information, causing the application to misinterpret memory structures and potentially crash during normal image rendering operations.
The technical flaw resides in the core image parsing and decoding components that lack adequate input validation and type checking procedures. When an image file contains malformed metadata or corrupted pixel data that contradicts expected type signatures, the system's type resolution mechanisms fail to properly handle these inconsistencies. This condition falls under the common weakness enumeration CWE-479 which specifically addresses improper handling of type confusion scenarios in software applications. The vulnerability allows attackers to craft malicious image files that trigger unexpected behavior within the image processing pipeline, leading to application instability and potential denial-of-service conditions.
The operational impact of this vulnerability extends beyond simple service disruption, as it represents a potential vector for more sophisticated attacks that could leverage the type confusion to execute arbitrary code or escalate privileges. While the immediate effect described is limited to denial-of-service conditions, the underlying architectural weakness creates opportunities for attackers to develop more advanced exploitation techniques. The affected platforms include multiple Apple operating systems spanning iOS, iPadOS, macOS variants, tvOS, visionOS, and watchOS, demonstrating the widespread nature of this vulnerability across Apple's ecosystem. Attackers could potentially craft malicious image files that cause applications to crash when users view them, leading to user experience degradation and potential service interruption.
Mitigation strategies should focus on implementing comprehensive input validation and type checking mechanisms throughout the image processing pipeline, ensuring that all data types are properly verified before any processing occurs. System administrators and developers should prioritize applying the latest security updates from Apple that address this specific vulnerability, as the patches include enhanced type validation routines that prevent malformed image data from causing system instability. The fix implemented in 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 incorporates additional defensive programming measures that enforce strict type checking during image parsing operations. Organizations should also consider implementing network-based filtering solutions that can detect and block suspicious image files at the perimeter, as outlined in attack techniques documented under the MITRE ATT&CK framework for privilege escalation and denial-of-service scenarios. The vulnerability serves as a reminder of the critical importance of robust input validation and type safety mechanisms in preventing both immediate service disruption and potential exploitation opportunities within operating system components.