CVE-2026-64696 in macOS
Summary
by MITRE • 07/28/2026
The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote user may be able to cause unexpected system termination or corrupt kernel memory.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical memory handling flaw that could enable remote attackers to trigger system instability or corrupt kernel memory through improper memory management operations. The issue stems from insufficient validation and handling of memory allocation and deallocation processes within the operating system's kernel components. When exploited, this weakness allows adversaries to craft malicious inputs or network requests that manipulate memory structures in ways that were not properly anticipated during system design. The vulnerability specifically affects systems running macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6, indicating it spans multiple major versions of the operating system. The flaw operates at the kernel level where memory management functions are executed, making it particularly dangerous as it can potentially bypass user-space protections and directly affect core system operations.
The technical exploitation of this vulnerability involves manipulating memory allocation patterns or triggering specific conditions that cause the kernel to handle memory in unexpected ways. This could manifest through buffer overflows, use-after-free conditions, or improper memory deallocation sequences that lead to corruption of kernel data structures. The remote nature of the attack means that adversaries do not need physical access to the target system and can potentially exploit this through network-based attacks. According to CWE classification, this vulnerability would likely map to CWE-125 Out-of-bounds Read or CWE-787 Out-of-bounds Write depending on the specific memory corruption pattern. The ATT&CK framework would categorize this under T1059 Command and Scripting Interpreter and potentially T1566 Phishing as attackers may need to deliver malicious payloads that trigger these memory handling issues.
The operational impact of this vulnerability extends beyond simple system crashes, as kernel memory corruption can lead to complete system compromise or allow for privilege escalation attacks. When the system experiences unexpected termination due to memory corruption, it creates potential opportunities for persistent access or denial-of-service conditions that could affect critical infrastructure. Organizations running affected macOS versions face significant risk if they do not apply the security patches released with the updated operating system versions, as these vulnerabilities can serve as entry points for more sophisticated attacks targeting enterprise networks. The fix implemented by Apple addresses the root cause through enhanced memory validation checks and improved handling of memory allocation sequences within kernel space.
The remediation strategy requires immediate deployment of the patched macOS versions across all affected systems to prevent exploitation attempts. System administrators should prioritize updating devices running macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6, as these represent the vulnerable versions that require patching. Organizations should also implement monitoring for unusual system behavior or unexpected terminations that might indicate exploitation attempts. Additional defensive measures include network segmentation to limit potential attack surface and implementing intrusion detection systems that can identify suspicious memory-related activities. The security community should remain vigilant for any related vulnerabilities that might be discovered in similar memory handling implementations across other operating systems, as this type of flaw often indicates broader architectural issues that could affect multiple platforms.