CVE-2026-69390 in Windows
Summary
by MITRE • 09/08/2026
Out-of-bounds read in Windows Spaceport.sys allows an authorized attacker to disclose information locally.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 09/08/2026
The vulnerability identified as CVE-2024-38069 represents a critical security flaw within the Microsoft Windows operating system, specifically located in the kernel-mode driver known as spaceport.sys. This component is integral to the management of virtualization and containerized workloads on modern Windows systems, particularly those leveraging Hyper-V or related technologies that rely on this specific driver for hardware abstraction and resource allocation. The nature of the flaw is classified as an out-of-bounds read, which falls under the Common Weakness Enumeration category CWE-125. This type of vulnerability occurs when a software application reads data from a memory location beyond the intended boundary of a buffer or array. In the context of kernel-mode drivers like spaceport.sys, such errors are particularly severe because they occur at the highest privilege level within the operating system architecture, granting potential attackers direct access to sensitive kernel structures and memory contents that are otherwise isolated from user-space applications.
The technical mechanism behind this vulnerability involves a failure in boundary checking during data retrieval operations performed by the spaceport driver. When processing specific inputs or handling certain virtualization requests, the driver fails to validate whether the requested read operation stays within the allocated memory limits. Consequently, if an authorized attacker can trigger these specific code paths through legitimate system interfaces or APIs exposed by the operating system, they can force the kernel to read from adjacent memory regions that contain sensitive information. This could include cryptographic keys, session tokens, internal process structures, or other confidential data residing in physical memory near the target buffer. The ability to perform such an operation effectively bypasses standard isolation mechanisms designed to protect kernel integrity and confidentiality, allowing for a localized disclosure of system secrets without requiring elevated privileges beyond what is already granted to the attacker's current context.
From an operational perspective, this vulnerability poses a significant risk to systems running vulnerable versions of Windows where spaceport.sys is active and accessible. Although the attack vector requires local access and authorization, meaning it cannot be exploited remotely over a network, it facilitates privilege escalation or information disclosure attacks that can lead to full system compromise if combined with other techniques. An attacker leveraging this flaw could potentially extract sensitive data from memory dumps or use side-channel effects derived from reading out-of-bounds locations to infer the state of protected processes. This aligns with ATT&CK technique T1005, which describes Data from Local System Memory, indicating that adversaries can harvest credentials and other secrets directly from RAM. The impact is not limited to immediate data theft; it also undermines the trust model of virtualization environments by allowing a compromised or malicious user account to窥探 (spy on) resources allocated to other users or system services managed through the same hypervisor infrastructure.
Mitigation strategies for this vulnerability primarily involve applying the latest security updates provided by Microsoft, which patch the underlying code in spaceport.sys to enforce strict bounds checking during memory access operations. Organizations should prioritize deploying these patches across all endpoints and servers that utilize Windows virtualization features or container runtimes dependent on this driver. In environments where immediate patching is not feasible due to compatibility concerns, network segmentation can help limit lateral movement if an attacker gains initial foothold via other means. Additionally, implementing strict access controls and least-privilege principles ensures that fewer users have the necessary permissions to interact with virtualization APIs, thereby reducing the attack surface available for triggering this specific out-of-bounds read condition. Regular auditing of system logs for unusual memory access patterns or kernel errors can also aid in detecting potential exploitation attempts before significant damage occurs.