CVE-2026-43781 in macOS
Summary
by MITRE • 07/28/2026
A race condition was addressed with improved state handling. 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 access sensitive user data.
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Analysis
by VulDB Data Team • 07/28/2026
A race condition vulnerability has been identified and resolved through enhanced state management mechanisms in recent macOS updates. This type of vulnerability typically occurs when multiple processes or threads attempt to access shared resources simultaneously, creating unpredictable behavior that can lead to security breaches. The flaw specifically affects the operating system's handling of user data access permissions and state transitions during concurrent operations.
The technical implementation of this race condition involves improper synchronization mechanisms within the kernel or system-level services responsible for managing user privileges and data access controls. When multiple applications or system processes attempt to read or modify sensitive user information concurrently, the lack of proper locking mechanisms or state validation can result in unauthorized data exposure. This vulnerability falls under the CWE-362 category known as "Concurrent Execution using Shared Resource with Improper Synchronization" which directly relates to improper handling of simultaneous access scenarios.
The operational impact of this vulnerability extends beyond simple data leakage, as malicious applications could potentially exploit the race condition to escalate privileges or gain unauthorized access to confidential user information. Attackers might leverage timing-based exploits to manipulate the system state during critical transitions, effectively bypassing normal security controls that should prevent unauthorized data access. This scenario represents a significant concern for user privacy and system integrity, particularly in environments where sensitive personal or corporate data is processed.
Security researchers have identified that this vulnerability could be exploited through carefully timed application sequences that take advantage of the window between state validation checks and actual resource access operations. The fix implemented in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6 addresses the root cause by introducing more robust mutex locking mechanisms and enhanced state validation procedures during concurrent data access scenarios.
Organizations should prioritize updating to these patched versions immediately, as the vulnerability could be exploited without user interaction through malicious applications that leverage the race condition for unauthorized data access. The remediation strategy involves implementing proper synchronization primitives within system services and ensuring that all state transitions are properly validated before granting access to sensitive resources. This fix aligns with ATT&CK technique T1074.001 which covers "Data Staged" through improved system-level access controls and prevents unauthorized data collection through concurrent execution vulnerabilities. System administrators should monitor for potential exploitation attempts and ensure that all endpoints are updated to prevent this class of vulnerability from being used in targeted attacks against user data repositories.