CVE-2026-64762 in macOS
Summary
by MITRE • 07/28/2026
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a classic out-of-bounds read condition that was addressed through enhanced bounds checking mechanisms within the operating system's kernel and system frameworks. The flaw existed in the memory management subsystem where applications could potentially trigger invalid memory access patterns that bypassed existing validation controls. Such vulnerabilities typically arise when software fails to properly verify array indices or buffer boundaries before accessing memory locations, creating opportunities for malicious code execution or system instability.
The technical implementation of this issue stems from insufficient input validation within system-level APIs and kernel components responsible for memory allocation and management. When an application attempts to read data beyond the allocated buffer boundaries, it can access adjacent memory regions that may contain sensitive information or system structures. This type of vulnerability falls under the common weakness enumeration CWE-129 which specifically addresses "Improper Validation of Array Index" and represents a fundamental flaw in defensive programming practices. The vulnerability demonstrates how inadequate bounds checking can create attack vectors that allow unauthorized access to system resources.
The operational impact of this vulnerability extends beyond simple system crashes, as it provides potential avenues for more sophisticated attacks that could escalate privileges or extract confidential information. An attacker could craft malicious applications designed to trigger the out-of-bounds read condition, potentially causing unexpected termination of critical system processes while simultaneously creating opportunities for information disclosure or privilege escalation. This aligns with attack patterns documented in the attack technique ATT&CK framework under T1059 for command and scripting interpreter and T1068 for exploit for privilege escalation. The vulnerability's potential to cause system instability makes it particularly dangerous in environments where reliability and security are paramount.
The mitigation strategy involves implementing comprehensive bounds checking mechanisms that validate all memory access operations before execution, ensuring that array indices and buffer boundaries are properly enforced. System updates address this through enhanced kernel protections that monitor and validate all memory operations, preventing unauthorized access patterns from executing successfully. Organizations should prioritize deployment of the patched versions including macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6 as these releases contain the necessary defensive controls to prevent exploitation. Additionally, system administrators should implement monitoring solutions that can detect anomalous memory access patterns and provide early warning of potential exploitation attempts. The fix demonstrates industry best practices for vulnerability remediation through proactive security updates and comprehensive system hardening measures that align with cybersecurity frameworks such as NIST SP 800-53 and ISO 27001 standards for information security management.