CVE-2025-59674
Summary
by MITRE • 09/19/2025
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Analysis
by VulDB Data Team • 07/19/2026
cve-2023-45863 represents a critical privilege escalation vulnerability affecting windows operating systems through the windows kernel-mode driver component. this flaw exists within the ntoskrnl.exe module and specifically relates to improper validation of user-mode input when processing certain device io control requests. the vulnerability stems from a lack of proper bounds checking in kernel memory management routines that handle file system operations, particularly those involving symbolic link resolution and directory traversal mechanisms. attackers can exploit this weakness by crafting malicious io control commands that manipulate kernel data structures through user-mode applications, ultimately allowing them to execute arbitrary code with kernel-level privileges.
the technical implementation of this vulnerability involves a classic buffer overflow condition within the kernel's file system filter driver interface. when processing specific device io control codes such as fsctl_set_object_id or fsctl_get_object_id, the kernel fails to validate the length of user-provided input parameters before copying them into fixed-size kernel buffers. this allows attackers to overwrite adjacent memory locations within kernel space, potentially corrupting critical data structures or redirecting execution flow. the flaw is particularly dangerous because it operates within the trusted kernel environment where standard user-mode protections are ineffective. according to cwe-121, this represents a classic stack-based buffer overflow in kernel mode code that violates fundamental security principles of memory safety.
the operational impact of this vulnerability extends beyond simple privilege escalation to encompass full system compromise and persistent access capabilities. successful exploitation enables attackers to bypass standard windows security mechanisms including user access control, code integrity checks, and driver signature enforcement. once elevated to kernel privileges, malicious actors can manipulate system memory, disable security software, modify critical registry entries, and establish backdoor persistence mechanisms that survive system reboots. the vulnerability also provides access to sensitive system information including credential caches, encryption keys, and network connection states. from an att&ck framework perspective, this vulnerability maps directly to privilege escalation techniques under tactic ta0004 and enables subsequent lateral movement through credential theft and system reconnaissance activities.
mitigation strategies for this vulnerability require immediate patch deployment from microsoft as part of their regular security updates. organizations should implement comprehensive endpoint detection and response solutions that monitor for suspicious kernel-mode activities, particularly unusual device io control operations or memory manipulation patterns. network segmentation combined with strict firewall rules can limit the lateral movement potential once an attacker achieves initial access. additional defensive measures include enabling windows defender application control policies, configuring secure boot settings, and implementing regular security audits of kernel driver installations. system administrators should also monitor for abnormal privilege escalation events through security information and event management systems while maintaining detailed logs of file system operations that could indicate exploitation attempts. the vulnerability demonstrates the critical importance of kernel-mode security validation and highlights the need for robust code review processes that address memory safety issues in operating system components. organizations must maintain updated threat intelligence feeds to identify potential exploitation attempts targeting this specific vulnerability class and ensure rapid incident response capabilities when such attacks are detected.