CVE-2026-43770 in macOS tvOS
Summary
by MITRE • 07/28/2026
A race condition was addressed with additional validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6. An app may be able to access sensitive user data.
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Analysis
by VulDB Data Team • 07/28/2026
A race condition vulnerability has been identified and addressed through enhanced validation mechanisms, representing a critical security concern that could potentially allow unauthorized access to sensitive user data. This type of vulnerability typically arises when multiple processes or threads attempt to access shared resources simultaneously without proper synchronization controls, creating opportunities for malicious actors to exploit timing discrepancies in system operations. The flaw affects multiple operating system versions including macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, and tvOS 26.6, indicating a widespread impact across Apple's ecosystem that requires immediate attention from system administrators and security professionals.
The technical nature of this race condition falls under CWE-362, which specifically addresses "Concurrent Execution using Shared Resource with Improper Synchronization," commonly known as the "race condition" vulnerability category. This classification emphasizes that the flaw occurs when multiple execution paths access shared data resources without adequate protection mechanisms, allowing for unpredictable behavior and potential security breaches. The vulnerability's resolution through additional validation suggests that the original implementation lacked proper atomic operations or mutex controls to prevent simultaneous access to sensitive data structures during critical system operations.
From an operational impact perspective, this race condition represents a significant threat to user privacy and system integrity, as it provides a potential vector for apps to access sensitive user data without proper authorization. The vulnerability could be exploited by malicious applications that are designed to take advantage of the timing window between resource allocation and access control enforcement. Attackers might leverage this weakness to intercept or manipulate user information, potentially leading to identity theft, financial fraud, or other serious privacy violations. The fact that this affects both desktop and mobile operating systems across multiple versions indicates that organizations must implement comprehensive patch management strategies to protect their users.
The mitigation strategy for this vulnerability involves deploying the security updates provided in the affected operating system versions, which include enhanced validation mechanisms designed to prevent concurrent access issues. System administrators should prioritize immediate deployment of these patches across all affected devices and monitor for any potential exploitation attempts during the transition period. Organizations implementing security monitoring solutions should also configure alerts for unusual access patterns that might indicate exploitation attempts. The fix addresses fundamental synchronization issues within the operating system's core components, ensuring that sensitive data operations follow proper atomic execution protocols that prevent unauthorized access during critical system transitions. This remediation aligns with ATT&CK technique T1059 which covers the use of system services and legitimate credentials for privilege escalation.