CVE-2026-43805 in iOS
Summary
by MITRE • 07/27/2026
A race condition was addressed with improved state handling. 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, watchOS 26.6. An app may be able to cause unexpected system termination or write kernel memory.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a classic race condition flaw that was resolved through enhanced state management mechanisms within Apple's operating systems. The issue stems from improper synchronization of system resources during concurrent operations, creating opportunities for malicious applications to exploit temporal gaps in the system's processing logic. Such race conditions typically occur when multiple threads or processes attempt to access shared resources simultaneously without proper coordination protocols.
The technical implementation of this flaw allowed an attacker-controlled application to manipulate system behavior in ways that could result in either unexpected termination of critical system processes or unauthorized write operations to kernel memory regions. This represents a severe privilege escalation vector since kernel memory access can fundamentally compromise system integrity and security boundaries. The vulnerability's exploitation potential aligns with common attack patterns documented in the attack mitigation framework where improper state handling creates predictable execution paths that adversaries can manipulate.
From a cybersecurity perspective, this issue demonstrates the critical importance of proper concurrency control mechanisms in operating system design, particularly within kernel-level components. The fix implemented through improved state handling addresses fundamental flaws in how the system manages resource allocation and process synchronization during high-concurrency scenarios. This aligns with established security practices outlined in the Common Weakness Enumeration catalog where race conditions are categorized under weakness identifiers that directly impact system stability and security posture.
The affected platforms span multiple Apple operating system versions including iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, and watchOS 26.6, indicating this represents a widespread systemic vulnerability that required coordinated patching across Apple's entire ecosystem. The operational impact of such vulnerabilities extends beyond simple system crashes to potentially enable more sophisticated attacks including privilege escalation, information disclosure, or persistent system compromise.
Security practitioners should note that this vulnerability type typically requires careful monitoring and patch management processes since race conditions often manifest only under specific timing conditions that may not be easily reproducible in controlled environments. The mitigation strategy focuses on ensuring proper state transitions and resource locking mechanisms throughout the system's execution paths, which aligns with established security engineering principles for preventing temporal logic flaws. Organizations should prioritize deployment of these patches across all affected platforms to maintain system integrity and prevent potential exploitation by threat actors who may be actively targeting such vulnerabilities in the wild.