CVE-2026-64744 in macOS
Summary
by MITRE • 07/28/2026
An information leakage was addressed with additional validation. 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 disclose kernel memory.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical information disclosure flaw that allows malicious applications to potentially access kernel memory regions through insufficient input validation mechanisms. The issue stems from inadequate sanitization of data inputs within the operating system's kernel space, creating an avenue for unauthorized memory access that could reveal sensitive system information. The vulnerability affects multiple macOS versions including Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6, indicating a widespread impact across the macOS ecosystem.
The technical implementation of this flaw involves kernel memory exposure through improper validation of application-supplied data. When applications interact with kernel services or system calls, insufficient checks on input parameters can lead to memory disclosure vulnerabilities where kernel addresses, sensitive data structures, or confidential information may be inadvertently exposed to user-space processes. This type of vulnerability falls under the CWE-20 category for Improper Input Validation and aligns with ATT&CK technique T1059.003 for Command and Scripting Interpreter. The exploitation potential increases when malicious applications can craft specific inputs that trigger memory corruption or information leakage behaviors within kernel modules.
The operational impact of this vulnerability extends beyond simple information disclosure, as access to kernel memory can provide attackers with insights into system internals including memory layout, kernel data structures, and potentially sensitive cryptographic keys or credentials. Attackers could leverage this information to bypass security mechanisms, develop more sophisticated exploits, or construct targeted attacks against specific system components. The vulnerability creates a persistent threat vector that remains active until patched, as any application running on the affected systems could theoretically exploit this weakness to gain unauthorized access to kernel memory spaces.
Mitigation strategies should focus on applying the available security updates from Apple, which address the root cause through enhanced input validation mechanisms and improved kernel memory protection. System administrators should prioritize deployment of the macOS patches across all affected versions immediately, particularly in environments where untrusted applications may be present. Additional protective measures include implementing application sandboxing controls, monitoring for unusual memory access patterns, and maintaining comprehensive system logging to detect potential exploitation attempts. The fix demonstrates Apple's approach to addressing information disclosure vulnerabilities through enhanced validation mechanisms that prevent malicious data from triggering unintended kernel behavior while maintaining system functionality and security posture.