CVE-2026-64768 in iOS
Summary
by MITRE • 07/28/2026
An out-of-bounds read issue 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 cause an unexpected app termination.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a classic out-of-bounds read flaw that was remediated through enhanced input validation mechanisms within Apple's operating system ecosystem. The issue manifested when applications processed malformed or untrusted input data without adequate bounds checking, potentially allowing malicious actors to trigger memory access violations. Such vulnerabilities typically arise from insufficient parameter validation in buffer operations, where the application fails to verify that data access remains within allocated memory boundaries.
The technical implementation of this flaw aligns with common software security weaknesses documented under CWE-129, which specifically addresses insufficient validation of length of input buffers. When an application attempts to read memory locations beyond the intended buffer limits, it creates opportunities for attackers to manipulate program execution flow or cause unexpected termination behaviors. The fix implemented by Apple involved strengthening input validation routines across their operating system frameworks, ensuring that all data processing operations include proper boundary checks before memory access occurs.
The operational impact of this vulnerability extends beyond simple application crashes, as it presents a potential vector for denial-of-service attacks targeting iOS, iPadOS, macOS, tvOS, and visionOS platforms. Remote attackers could exploit the vulnerability by crafting malicious input streams that trigger the out-of-bounds read condition, resulting in application termination and potentially disrupting user workflows. This type of vulnerability is particularly concerning within Apple's ecosystem where users expect reliable system behavior and seamless application performance.
The mitigation strategy implemented by Apple demonstrates adherence to security best practices through comprehensive patching across multiple operating system versions. The fix addresses the root cause by enforcing stricter input validation protocols that align with industry standards such as those recommended in the CERT Secure Coding Standards for C and C++. Organizations should prioritize deploying these updates immediately, as they represent a critical security measure against potential exploitation attempts. The coordinated release across all affected platforms indicates Apple's commitment to maintaining system integrity through proactive vulnerability remediation.
Security practitioners should monitor for potential exploitation attempts targeting this vulnerability class, particularly within environments where legacy applications might still be running without proper input validation. The remediation approach taken by Apple provides a robust example of how implementing proper bounds checking and input sanitization can prevent such memory safety issues, aligning with ATT&CK framework techniques related to privilege escalation and denial-of-service attacks through software vulnerabilities.