CVE-2026-57092 in Windows
Summary
by MITRE • 07/14/2026
Use after free in Windows VMSwitch allows an authorized attacker to elevate privileges over a network.
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Analysis
by VulDB Data Team • 07/15/2026
This vulnerability represents a critical use-after-free condition in the Windows VMSwitch component that enables authenticated remote attackers to achieve privilege escalation. The flaw exists within the virtual switching infrastructure that manages network traffic for virtual machines, specifically when handling memory allocation and deallocation processes during network packet processing. When a malicious actor successfully exploits this vulnerability, they can manipulate freed memory regions to execute arbitrary code with elevated privileges, effectively bypassing standard security boundaries that protect system integrity.
The technical implementation of this vulnerability stems from improper memory management within the VMSwitch driver where allocated memory structures are not properly validated before reuse. This allows an attacker who has network access to a compromised virtual machine to craft malicious network packets that trigger the use-after-free condition. The vulnerability operates at the kernel level within the hypervisor environment, making it particularly dangerous as it can be exploited across multiple virtualized environments simultaneously.
From an operational impact perspective, this vulnerability enables attackers to move laterally through virtualized networks and potentially gain SYSTEM-level privileges on the host system. The attack vector requires only network access to a compromised guest VM, making it highly exploitable in environments where virtualization is extensively used. Organizations running cloud services, virtual desktop infrastructures, or any environment utilizing Windows-based virtual switching are at significant risk. The vulnerability can be leveraged to establish persistent access points and escalate privileges beyond the initial compromise.
The exploitation process typically involves crafting specific network traffic patterns that cause the VMSwitch component to reference freed memory locations, which can then be manipulated to redirect execution flow. This represents a sophisticated attack technique that aligns with ATT&CK technique T1059 for execution and T1068 for privilege escalation. The vulnerability demonstrates weak input validation and memory safety mechanisms that should be addressed through proper defensive programming practices and runtime protections.
Organizations should implement immediate mitigations including applying security patches from Microsoft, isolating virtualized environments through network segmentation, and monitoring for unusual network traffic patterns that might indicate exploitation attempts. The use of hypervisor-level security controls and runtime application whitelisting can provide additional defense-in-depth measures. Regular vulnerability assessments targeting virtualization components and adherence to secure coding standards should be enforced throughout the organization's infrastructure to prevent similar vulnerabilities from emerging in future releases.
This vulnerability specifically relates to CWE-416 which describes "Use After Free" conditions, and demonstrates how improper memory management in hypervisor components can create severe security implications. The attack model follows patterns consistent with privilege escalation techniques documented in MITRE ATT&CK framework, particularly focusing on the use of kernel-level vulnerabilities for system compromise. Organizations must prioritize updating their virtualization infrastructure and implementing comprehensive monitoring solutions to detect exploitation attempts targeting such critical infrastructure components.