CVE-2022-23268

Guest-triggered host service interruption

Published Apr 15, 2022 · Updated Jan 2, 2025

Denial of service in Microsoft Hyper-V on affected Windows 11 and Windows Server 2022 builds allows guest OS users to disrupt the host. Microsoft has not published the flawed Hyper-V operation or the guest-supplied input that triggers the condition. Low-privileged guest access is required, and successful exploitation interrupts host functionality without reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Microsoft Hyper-V on affected Windows 11 and Windows Server 2022 builds allows guest OS users to disrupt the host. Microsoft has not published the flawed Hyper-V operation or the guest-supplied input that triggers the condition. Low-privileged guest access is required, and successful exploitation interrupts host functionality without reported data disclosure or modification.

The record

CVE
CVE-2022-23268
Published
Apr 15, 2022
Updated
Jan 2, 2025
Vendor
Microsoft
Product
Windows 11 version 21H2
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.0 <10.0.22000.613

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.613
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.643

Published CVSS scores

6.5MicrosoftCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
2.1NVDAV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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