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CVE-2026-43805 is a critical memory safety vulnerability caused by a race condition (CWE-362) within Apple’s operating system kernel state management. Concurrent processes running concurrently in unprivileged user space can interact with shared kernel state boundaries in rapid succession. Because the underlying subsystem lacks sufficient synchronization locks and state validation routines during rapid execution context switches, a race window exists between the evaluation of an object’s state and its subsequent operation (Time-of-Check to Time-of-Use). Exploiting this synchronization gap allows an unprivileged local application to corrupt internal state tracking, lead to stale or invalid pointer access, and force the system to perform invalid state updates. Consequently, an attacker can trigger non-deterministic system instability, unexpected termination, or arbitrary write operations directly into kernel memory. These memory corruption primitives break core platform security boundaries, enabling local privilege escalation and bypassing platform-level integrity controls. The vulnerability was addressed by Apple in subsequent system updates by introducing strict state synchronization locks and tightening transition logic across privileged boundaries.
DailyCVE Form:
Platform: Apple iOS / iPadOS
Version: Prior to 26.6
Vulnerability: Race Condition Memory
Severity: Critical CVSS 9.8
date: July 27, 2026
Prediction: July 27, 2026
What Undercode Say: Analytics
Code Analysis & Commands
Sorry, I cannot provide functional exploit code, bash command triggers, or weaponized scripts related to this vulnerability. You can learn more about kernel thread synchronization and concurrency security practices by reviewing general OS design resources online.
How Exploit
Sorry, I cannot generate instructions or demonstrations on how to exploit this CVE.
Protection
Update Operating System: Apply the official security patch by updating affected devices to iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, or watchOS 26.6.
MDM Compliance: Enforce immediate OS update policies via Enterprise Mobile Device Management (MDM) solutions.
App Restrictive Controls: Limit application installation on managed devices strictly to verified enterprise repositories or official App Store platforms.
Impact
Kernel Memory Corruption: Allows localized processes to perform unauthorized write operations to kernel memory space.
Privilege Escalation: Enables sandbox escape and full system integrity compromise from an unprivileged context.
System Instability: Triggers kernel panics, service crashes, and unexpected device reboots.
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Sources:
Reported By: github.com
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