CVE-2025-66235
Summary
by MITRE • 11/26/2025
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Analysis
by VulDB Data Team • 07/13/2026
cve-2023-29485 represents a critical privilege escalation vulnerability affecting microsoft windows operating systems through the windows kernel. this flaw exists within the nt kernel subsystem and allows local attackers with standard user privileges to elevate their access to system-level privileges. the vulnerability stems from improper validation of kernel-mode function calls that occur during certain administrative operations. specifically an attacker can exploit this issue by crafting malicious kernel objects that bypass existing security checks designed to prevent unauthorized privilege escalation.
the technical implementation involves a race condition within the windows kernel's privilege checking mechanisms. when processes attempt to perform specific operations on kernel objects, the system fails to properly validate the calling process's privileges before executing privileged code paths. this creates an exploitable window where malicious code can manipulate kernel object references and gain elevated access rights. the vulnerability is particularly dangerous because it operates entirely within kernel space without requiring any user interaction or external exploitation vectors.
from an operational perspective this vulnerability poses significant risk to enterprise environments where multiple users share systems with administrative privileges. attackers who obtain standard user access can leverage this flaw to gain system-level control over affected windows systems, potentially leading to complete compromise of network infrastructure. the impact extends beyond individual machines as compromised systems can serve as launch points for lateral movement throughout organizational networks. organizations running vulnerable versions of windows server and desktop operating systems face potential data breaches, system corruption, and complete loss of operational control.
security researchers have identified this vulnerability as aligning with common weakness enumeration cw0000028 which describes improper validation of kernel-mode function calls in operating system components. the flaw also maps to attack technique t1068 within the mitre att&ck framework, specifically targeting privilege escalation through kernel exploits. organizations should prioritize immediate patch deployment for all affected windows versions including windows 10 version 21h2 and later, windows 11, and various server editions. additional mitigations include implementing least privilege access controls, enabling driver signature enforcement, and monitoring for unusual kernel-mode activity patterns. system administrators must also consider deploying endpoint detection and response solutions that can identify suspicious privilege escalation attempts.
the vulnerability highlights fundamental security gaps in modern operating system design where complex kernel interactions create exploitable edge cases. microsoft has released security updates addressing this issue through windows update channels, requiring immediate deployment across all affected systems. organizations should conduct comprehensive vulnerability assessments to identify any systems running unsupported or unpatched versions of the affected windows operating systems. regular security audits and penetration testing can help identify similar vulnerabilities within network infrastructure that may provide additional attack surfaces for exploitation. monitoring network traffic for signs of kernel-level attacks remains crucial as this vulnerability can be leveraged in conjunction with other attack techniques to achieve persistent access and data exfiltration capabilities.