CVE-2026-43750
Summary
by MITRE • 07/27/2026
A buffer overflow 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 execute arbitrary code out of its sandbox or with certain elevated privileges.
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Analysis
by VulDB Data Team • 07/27/2026
This vulnerability represents a critical buffer overflow condition that was remediated through enhanced bounds checking mechanisms within Apple's operating system frameworks. The flaw existed across multiple macOS versions including Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6, indicating a widespread impact across the Apple ecosystem. Buffer overflow vulnerabilities typically occur when a program writes more data to a fixed-length buffer than it can accommodate, leading to memory corruption that adversaries can potentially exploit. The technical implementation of this vulnerability stems from inadequate input validation and memory management practices within system-level components that handle data processing and user interactions.
The operational impact of this vulnerability extends beyond typical sandbox restrictions, as it potentially allows malicious applications to execute arbitrary code outside their designated security boundaries or with elevated privileges. This represents a significant escalation in attack surface since sandboxing mechanisms are designed to contain applications and prevent them from accessing unauthorized system resources or executing privileged operations. The exploitability of such vulnerabilities aligns with ATT&CK technique T1068 which covers local privilege escalation, while the sandbox bypass aspect corresponds to T1497 which addresses virtualization and sandbox evasion techniques. Organizations and end users face heightened risk as this vulnerability could enable adversaries to gain unauthorized access to system resources, potentially leading to full system compromise or data exfiltration.
The remediation approach taken by Apple involved implementing improved bounds checking protocols that prevent buffer overflows from occurring in the first place. This technical solution addresses the root cause by ensuring that memory allocations properly validate input lengths and prevent overflow conditions before they can be exploited. The fix demonstrates adherence to secure coding practices recommended in CWE 121, which specifically addresses stack-based buffer overflow conditions, and CWE 787, which covers out-of-bounds write vulnerabilities. System administrators should prioritize deployment of these security updates across all affected macOS installations to prevent potential exploitation attempts. The vulnerability highlights the importance of continuous security monitoring and timely patch management, particularly for operating system components that handle privileged operations or user input processing. Organizations should conduct vulnerability assessments to identify any applications that may be running on affected systems and ensure comprehensive coverage of all endpoints within their infrastructure.