Description

An attacker may achieve arbitrary code execution on a target system by uploading a malicious device driver package, bypassing driver verification mechanisms, and triggering the execution of attacker-controlled code. User interaction is required.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.3",
  "pubDate": "2026-09-11T09:17:20.833Z",
  "pubdate": "2026-09-11T09:17:20.833Z",
  "executiveSummary": "This vulnerability involves a critical failure in the verification mechanisms governing the installation of device driver packages, permitting the execution of unauthorized, attacker-controlled code within the kernel-mode environment.\nThe vulnerability is classified as an improper authorization and signature validation flaw. By successfully bypassing established driver integrity checks, an adversary can achieve arbitrary code execution at the highest privilege levels of the operating system.\nThe impact of this vulnerability is severe, as it grants attackers persistent control over the host system, allowing for complete compromise of system integrity, confidentiality, and availability.\nExploitation requires active user interaction, such as the manual initiation of a driver installation process. Once triggered, the malicious driver facilitates the transition from user-mode to kernel-mode execution, effectively subverting platform security controls.\nRisk implications are high, specifically for environments where peripheral hardware or software requiring driver installation is frequently deployed. The vulnerability allows an attacker to operate with kernel-level privileges, bypassing traditional sandboxing and user-mode restrictions.",
  "technicalDetails": "The root cause of this vulnerability lies in the insufficient validation of digital signatures or metadata within a device driver package during the installation sequence. The operating system's kernel-mode driver signing requirements are intended to ensure that only verified, trusted code can interface with hardware or operate within the kernel address space.\nThe attack flow commences when a target user is induced to interact with a crafted driver package. Upon execution, the vulnerability allows the malicious package to bypass the signature verification logic, either through a race condition, a flaw in the trust chain assessment, or the exploitation of an improperly secured installation interface.\nBecause device drivers operate within Ring 0 (kernel mode), the execution of an unverified driver provides the attacker with direct access to physical memory, system registers, and hardware interrupts. This subversion of the kernel's integrity allows for the injection of malicious modules that remain resident in memory.\nExploitation involves the following technical steps: First, the attacker prepares a malicious payload encapsulated within a standard driver package structure. Second, the attacker leverages social engineering to prompt the user to install the malicious driver. Third, the vulnerability in the validation mechanism is triggered during the installation phase, causing the system to accept the malicious package despite its lack of a valid, authorized signature. Finally, the malicious code is loaded into the kernel, providing the attacker with persistent, unrestricted control over the operating environment.\nPost-exploitation impact is catastrophic, as kernel-mode code execution permits the disabling of antivirus software, the extraction of sensitive kernel-resident data, and the deployment of rootkits that survive system reboots by hooking critical system functions or modifying the boot sequence. Because the attacker operates at the kernel level, detection by user-mode endpoint security solutions is significantly hampered, as the malicious processes can intercept and manipulate the data reported to the operating system."
}