CVE-2026-64774 in iOS
Summary
by MITRE • 07/28/2026
An integer overflow was addressed with improved input validation. 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. A remote attacker may be able to cause unexpected application termination or heap corruption.
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Analysis
by VulDB Data Team • 07/28/2026
An integer overflow vulnerability represents a critical class of software flaw that occurs when a program attempts to store a value that exceeds the maximum capacity of an integer data type. This particular vulnerability was identified in Apple's operating systems and addressed through enhanced input validation mechanisms. The flaw manifests when applications process numeric inputs without proper bounds checking, potentially leading to unexpected behavior when arithmetic operations exceed predefined limits. Such vulnerabilities are particularly dangerous because they can be exploited to manipulate program execution flow or corrupt memory structures.
The technical implementation of this vulnerability involves scenarios where integer variables reach their maximum allowable values and subsequently wrap around to minimum values, creating unpredictable conditions that attackers can leverage. This type of flaw typically falls under CWE-190, which specifically addresses integer overflow conditions in software development. When an attacker crafts malicious input that triggers this condition, the system may experience application crashes or more severe heap corruption that could potentially be exploited for privilege escalation or arbitrary code execution.
The operational impact of this vulnerability extends across multiple Apple platforms including iOS, iPadOS, macOS versions, tvOS, and visionOS, indicating a widespread concern affecting various device types and operating system variants. Remote exploitation capabilities mean that attackers do not require physical access to target devices, making the vulnerability particularly concerning for enterprise environments and consumer applications. The potential for heap corruption presents additional risks beyond simple application termination, as memory corruption can lead to more sophisticated attack vectors that may compromise system integrity.
Security professionals should prioritize patch management for affected systems, ensuring all devices receive updates to iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, and visionOS 26.6. The mitigation strategy focuses on input validation improvements that prevent integer overflow conditions from occurring during normal application operation. Organizations should conduct vulnerability assessments to identify systems running older versions of these operating systems and implement remediation procedures. This vulnerability also aligns with ATT&CK technique T1059 which covers command and scripting interpreter usage, as attackers may attempt to exploit such conditions to gain unauthorized access or execute malicious code within affected environments.