A new vulnerability has been discovered in the Windows Hyper-V, a native hypervisor enabling users to create and manage virtual machines. Tracked under the identifier CVE-2022-22713, this vulnerability poses a significant risk of a Denial of Service (DoS) attack. It is crucial for system administrators and security professionals to understand the gravity of this security issue, its implications, and the necessary steps to protect their virtualized environments.

In this long-read post, we will delve into the details of this vulnerability, including code snippets, necessary patches, references to original sources, and the actions required to ensure that your Windows Hyper-V systems remain secure against potential exploitation.

What is CVE-2022-22713?

CVE-2022-22713 refers to a Windows Hyper-V Denial of Service Vulnerability, which allows an attacker to exploit a weakness in the Hyper-V implementation to trigger a DoS attack. In this scenario, the attacker remotely sends malicious packets to the target Hyper-V system, causing it to crash or become unresponsive.

Microsoft has recognized the severity of this issue and assigned a Common Vulnerabilities and Exposures (CVE) identifier to track the resolution process.

Mitigation and Patch

Microsoft has released a security update to address this vulnerability. System administrators using Windows Hyper-V are recommended to apply this patch as soon as possible to minimize the risk of compromise. The official security update can be found at Microsoft Update Catalog.

Exploit Example

The example below illustrates an exploitation attempt using a maliciously crafted packet targeting the Hyper-V environment:

import socket

target_ip = ''
target_port = 12345 # Change this to the port being used by Hyper-V

def send_exploit_packet(target_ip, target_port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    exploit_packet = b"EVIL_PACKET_CONTENT_HERE" # Replace this with actual malicious payload
    sock.sendto(exploit_packet, (target_ip, target_port))

send_exploit_packet(target_ip, target_port)

Keep in mind that this example is for instructional purposes only. It is crucial to understand that running such code on other people's systems without permission constitutes illegal activity and severe penalties.

To protect your Windows Hyper-V systems from this DoS vulnerability, follow these steps

1. Apply the security update provided by Microsoft. As mentioned earlier, the patch can be obtained from the Microsoft Update Catalog.

Ensure that your systems are regularly updated and have the latest security patches installed.

3. Be vigilant and watch for any suspicious activities in your network that may indicate exploitation attempts.

Limit access to your Hyper-V environments to trusted sources only.

5. Establish and enforce strict password policies for user accounts that can access and manage the virtual machines.


The disclosure of a Windows Hyper-V Denial of Service vulnerability (CVE-2022-22713) mandates immediate attention, patching, and precautionary measures for those managing virtualized environments. Applying the Microsoft patch and implementing the mitigation steps outlined in this article will help maintain your system's integrity and prevent unauthorized exploitation attempts.

Stay updated on the latest security developments, and follow best practices for securing your virtualized environments to ensure the safety and security of your network infrastructure.

For more information on CVE-2022-22713, visit the following resources

1. CVE-2022-22713 | Microsoft Security Response Center
2. NVD - CVE-2022-22713


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