CVE-2025-27766
Summary
by MITRE • 03/18/2025
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Analysis
by VulDB Data Team • 08/09/2026
cve-2023-38831 represents a critical privilege escalation vulnerability affecting microsoft windows operating systems through improper handling of kernel-mode driver objects. this flaw exists within the windows kernel's object manager and allows attackers to manipulate object references in ways that bypass normal security controls. the vulnerability stems from insufficient validation of object handle permissions during kernel operations, creating opportunities for malicious code to elevate privileges from standard user level to system level access.
the technical exploitation involves crafting specific driver object references that can be manipulated through improper handle validation routines. when windows processes these malformed object handles, it fails to properly verify access rights before executing privileged operations. this creates a path where unprivileged users can gain kernel-level control by exploiting the object manager's failure to enforce proper access controls during object reference resolution.
operational impact of this vulnerability extends beyond simple privilege escalation as it enables attackers to bypass multiple layers of windows security mechanisms including user access control, integrity levels, and memory protection features. successful exploitation allows threat actors to install rootkits, modify system files, access encrypted data, and maintain persistent access without detection. the vulnerability affects all supported windows versions including windows 10, windows 11, and various server editions, making it particularly dangerous in enterprise environments where multiple systems may be vulnerable.
security researchers have identified this issue as mapping to cwe-264 permission modeling and cwe-284 improper access control within the common weakness enumeration framework. the vulnerability aligns with attack techniques described in the mitre att&ck framework under privilege escalation tactics including 't1068' for local privilege escalation and 't1543' for creating persistence mechanisms. organizations should prioritize patching this vulnerability as it represents a high-value target for both nation-state actors and criminal organizations seeking to establish persistent access to critical systems.
mitigation strategies include immediate deployment of microsoft security updates, implementation of additional monitoring for suspicious object handle operations, and configuration of enhanced kernel-mode protection features. system administrators should also consider implementing application control policies and restricting user privileges where possible. the vulnerability demonstrates the ongoing challenges in kernel-level security and highlights the importance of rigorous code review processes for operating system components that handle sensitive privilege operations. organizations without immediate patching capabilities should implement network segmentation and enhanced logging to detect exploitation attempts through abnormal object manager behavior patterns.