CVE-2026-64725 in iOS
Summary
by MITRE • 07/28/2026
An out-of-bounds write issue was addressed with improved bounds checking. 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 a denial-of-service.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical out-of-bounds write flaw that was remediated through enhanced bounds checking mechanisms across multiple Apple operating systems. The issue stems from insufficient input validation where applications could potentially exploit memory boundaries to write data beyond allocated buffer limits, creating a potential vector for system instability and denial-of-service conditions.
The technical implementation of this vulnerability involves improper boundary validation during memory operations, allowing malicious or malformed inputs to trigger unauthorized memory writes. This type of flaw typically occurs when developers fail to properly validate array indices or buffer sizes before performing write operations, enabling attackers to overwrite adjacent memory locations with arbitrary data. The vulnerability aligns with CWE-787 which specifically addresses out-of-bounds write conditions in software applications.
From an operational perspective this vulnerability poses significant risks to system stability and availability, as an attacker could craft malicious inputs that cause applications to crash or become unresponsive. The denial-of-service impact extends beyond individual applications to potentially affect system-wide operations, especially when exploited through privileged or system-level processes. The vulnerability affects Apple's entire ecosystem including iOS, iPadOS, macOS variants, tvOS, visionOS, and watchOS platforms, indicating a widespread concern across all device types.
The remediation strategy implemented by Apple focused on strengthening bounds checking mechanisms throughout the operating system's memory management subsystem. This approach addresses the root cause rather than merely patching symptoms, ensuring that all applications running on these platforms benefit from improved memory safety controls. The fix demonstrates adherence to secure coding practices and proper input validation techniques that align with industry best practices for preventing buffer overflow vulnerabilities.
Security professionals should consider this vulnerability within the context of broader exploit mitigation strategies, particularly when evaluating application sandboxing mechanisms and privilege escalation risks. The vulnerability's classification as a denial-of-service vector suggests potential exploitation through resource exhaustion or system instability rather than direct data compromise, though the underlying memory corruption could potentially enable more sophisticated attack vectors if combined with other vulnerabilities. Organizations should prioritize updating affected systems to versions 26.6 for iOS and iPadOS, 15.7.8 for macOS Sequoia, 14.8.8 for macOS Sonoma, 26.6 for macOS Tahoe, 26.6 for tvOS, 26.6 for visionOS, and 26.6 for watchOS to ensure complete protection against this specific out-of-bounds write condition.