MSRC_CVE-2026-42972
Vulnerability from csaf_microsoft - Published: 2026-06-09 07:00 - Updated: 2026-06-09 07:00Summary
Windows Hyper-V Information Disclosure Vulnerability
Severity
Important
Notes
Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Customer Action: Required. The vulnerability documented by this CVE requires customer action to resolve.
CWE-200
- Exposure of Sensitive Information to an Unauthorized Actor
Affected products
Fixed
25 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Windows Server 2012 6.2.9200.26132
Windows Server 2012
|
6.2.9200.26132 | ||
|
Windows Server 2012 (Server Core installation) 6.2.9200.26132
Windows Server 2012 (Server Core installation)
|
6.2.9200.26132 | ||
|
Windows Server 2012 R2 6.3.9600.23228
Windows Server 2012 R2
|
6.3.9600.23228 | ||
|
Windows Server 2012 R2 (Server Core installation) 6.3.9600.23228
Windows Server 2012 R2 (Server Core installation)
|
6.3.9600.23228 | ||
|
Windows Server 2016 10.0.14393.9234
Windows Server 2016
|
10.0.14393.9234 | ||
|
Windows 10 Version 1607 for x64-based Systems 10.0.14393.9234
Windows 10 Version 1607 for x64-based Systems
|
10.0.14393.9234 | ||
|
Windows Server 2016 (Server Core installation) 10.0.14393.9234
Windows Server 2016 (Server Core installation)
|
10.0.14393.9234 | ||
|
Windows 10 Version 1809 for x64-based Systems 10.0.17763.8880
Windows 10 Version 1809 for x64-based Systems
|
10.0.17763.8880 | ||
|
Windows Server 2019 10.0.17763.8880
Windows Server 2019
|
10.0.17763.8880 | ||
|
Windows Server 2019 (Server Core installation) 10.0.17763.8880
Windows Server 2019 (Server Core installation)
|
10.0.17763.8880 | ||
|
Windows Server 2022 10.0.20348.5256
Windows Server 2022
|
10.0.20348.5256 | ||
|
Windows Server 2022 (Server Core installation) 10.0.20348.5256
Windows Server 2022 (Server Core installation)
|
10.0.20348.5256 | ||
|
Windows 10 Version 21H2 for x64-based Systems 10.0.19044.7417
Windows 10 Version 21H2 for x64-based Systems
|
10.0.19044.7417 | ||
|
Windows 10 Version 22H2 for x64-based Systems 10.0.19045.7417
Windows 10 Version 22H2 for x64-based Systems
|
10.0.19045.7417 | ||
|
Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.7219
Windows 11 Version 23H2 for ARM64-based Systems
|
10.0.22631.7219 | ||
|
Windows 11 Version 23H2 for x64-based Systems 10.0.22631.7219
Windows 11 Version 23H2 for x64-based Systems
|
10.0.22631.7219 | ||
|
Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8655
Windows 11 Version 24H2 for ARM64-based Systems
|
10.0.26100.8655 | ||
|
Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8655
Windows 11 Version 24H2 for x64-based Systems
|
10.0.26100.8655 | ||
|
Windows Server 2025 10.0.26100.32995
Windows Server 2025
|
10.0.26100.32995 | ||
|
Windows Server 2025 (Server Core installation) 10.0.26100.32995
Windows Server 2025 (Server Core installation)
|
10.0.26100.32995 | ||
|
Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8655
Windows 11 Version 25H2 for ARM64-based Systems
|
10.0.26200.8655 | ||
|
Windows 11 Version 25H2 for x64-based Systems 10.0.26200.8655
Windows 11 Version 25H2 for x64-based Systems
|
10.0.26200.8655 | ||
|
Windows 11 version 26H1 for x64-based Systems 10.0.28000.2269
Windows 11 version 26H1 for x64-based Systems
|
10.0.28000.2269 | ||
|
Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.2269
Windows 11 Version 26H1 for ARM64-based Systems
|
10.0.28000.2269 | ||
|
Windows 11 Version 26H1 for x64-based Systems - extra 10.0.28000.2269
Windows 11 Version 26H1 for x64-based Systems - extra
|
10.0.28000.2269 |
Known affected
25 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Windows 11 Version 26H1 for x64-based Systems - extra <10.0.28000.2269
Windows 11 Version 26H1 for x64-based Systems - extra
|
<10.0.28000.2269 |
Vendor Fix
fix
|
|
|
Windows 11 Version 26H1 for ARM64-based Systems <10.0.28000.2269
Windows 11 Version 26H1 for ARM64-based Systems
|
<10.0.28000.2269 |
Vendor Fix
fix
|
|
|
Windows 11 version 26H1 for x64-based Systems <10.0.28000.2269
Windows 11 version 26H1 for x64-based Systems
|
<10.0.28000.2269 |
Vendor Fix
fix
|
|
|
Windows 11 Version 25H2 for x64-based Systems <10.0.26200.8655
Windows 11 Version 25H2 for x64-based Systems
|
<10.0.26200.8655 |
Vendor Fix
fix
|
|
|
Windows 11 Version 25H2 for ARM64-based Systems <10.0.26200.8655
Windows 11 Version 25H2 for ARM64-based Systems
|
<10.0.26200.8655 |
Vendor Fix
fix
|
|
|
Windows Server 2025 (Server Core installation) <10.0.26100.32995
Windows Server 2025 (Server Core installation)
|
<10.0.26100.32995 |
Vendor Fix
fix
|
|
|
Windows Server 2025 <10.0.26100.32995
Windows Server 2025
|
<10.0.26100.32995 |
Vendor Fix
fix
|
|
|
Windows 11 Version 24H2 for x64-based Systems <10.0.26100.8655
Windows 11 Version 24H2 for x64-based Systems
|
<10.0.26100.8655 |
Vendor Fix
fix
|
|
|
Windows 11 Version 24H2 for ARM64-based Systems <10.0.26100.8655
Windows 11 Version 24H2 for ARM64-based Systems
|
<10.0.26100.8655 |
Vendor Fix
fix
|
|
|
Windows 11 Version 23H2 for x64-based Systems <10.0.22631.7219
Windows 11 Version 23H2 for x64-based Systems
|
<10.0.22631.7219 |
Vendor Fix
fix
|
|
|
Windows 11 Version 23H2 for ARM64-based Systems <10.0.22631.7219
Windows 11 Version 23H2 for ARM64-based Systems
|
<10.0.22631.7219 |
Vendor Fix
fix
|
|
|
Windows 10 Version 22H2 for x64-based Systems <10.0.19045.7417
Windows 10 Version 22H2 for x64-based Systems
|
<10.0.19045.7417 |
Vendor Fix
fix
|
|
|
Windows 10 Version 21H2 for x64-based Systems <10.0.19044.7417
Windows 10 Version 21H2 for x64-based Systems
|
<10.0.19044.7417 |
Vendor Fix
fix
|
|
|
Windows Server 2022 (Server Core installation) <10.0.20348.5256
Windows Server 2022 (Server Core installation)
|
<10.0.20348.5256 |
Vendor Fix
fix
|
|
|
Windows Server 2022 <10.0.20348.5256
Windows Server 2022
|
<10.0.20348.5256 |
Vendor Fix
fix
|
|
|
Windows Server 2019 (Server Core installation) <10.0.17763.8880
Windows Server 2019 (Server Core installation)
|
<10.0.17763.8880 |
Vendor Fix
fix
|
|
|
Windows Server 2019 <10.0.17763.8880
Windows Server 2019
|
<10.0.17763.8880 |
Vendor Fix
fix
|
|
|
Windows 10 Version 1809 for x64-based Systems <10.0.17763.8880
Windows 10 Version 1809 for x64-based Systems
|
<10.0.17763.8880 |
Vendor Fix
fix
|
|
|
Windows Server 2016 (Server Core installation) <10.0.14393.9234
Windows Server 2016 (Server Core installation)
|
<10.0.14393.9234 |
Vendor Fix
fix
|
|
|
Windows 10 Version 1607 for x64-based Systems <10.0.14393.9234
Windows 10 Version 1607 for x64-based Systems
|
<10.0.14393.9234 |
Vendor Fix
fix
|
|
|
Windows Server 2016 <10.0.14393.9234
Windows Server 2016
|
<10.0.14393.9234 |
Vendor Fix
fix
|
|
|
Windows Server 2012 R2 (Server Core installation) <6.3.9600.23228
Windows Server 2012 R2 (Server Core installation)
|
<6.3.9600.23228 |
Vendor Fix
fix
|
|
|
Windows Server 2012 R2 <6.3.9600.23228
Windows Server 2012 R2
|
<6.3.9600.23228 |
Vendor Fix
fix
|
|
|
Windows Server 2012 (Server Core installation) <6.2.9200.26132
Windows Server 2012 (Server Core installation)
|
<6.2.9200.26132 |
Vendor Fix
fix
|
|
|
Windows Server 2012 <6.2.9200.26132
Windows Server 2012
|
<6.2.9200.26132 |
Vendor Fix
fix
|
Threats
Impact
Information Disclosure
Exploit Status
Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely
References
7 references
Acknowledgments
<a href="https://smlijun.github.io/">DongJun Kim</a> with <a href="https://www.enki.co.kr/">Enki WhiteHat</a>
Ahmad Abdillah bin Zaini
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"title": "Additional Resources"
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{
"category": "legal_disclaimer",
"text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
"title": "Disclaimer"
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},
{
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"url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42972.json"
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{
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"title": "Windows Hyper-V Information Disclosure Vulnerability",
"tracking": {
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"generator": {
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"name": "Exposure of Sensitive Information to an Unauthorized Actor"
},
"notes": [
{
"category": "general",
"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
"text": "The type of information that could be disclosed if an attacker successfully exploited this vulnerability is\tKernel memory read - unintentional read access to memory contents in kernel space from a user mode process.",
"title": "What type of information could be disclosed by this vulnerability?"
}
],
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},
"references": [
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"summary": "CVE-2026-42972 Windows Hyper-V Information Disclosure Vulnerability - HTML",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42972"
},
{
"category": "self",
"summary": "CVE-2026-42972 Windows Hyper-V Information Disclosure Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42972.json"
}
],
"remediations": [
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 4.8,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
"version": "3.1"
},
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]
}
],
"threats": [
{
"category": "impact",
"details": "Information Disclosure"
},
{
"category": "exploit_status",
"details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
}
],
"title": "Windows Hyper-V Information Disclosure Vulnerability"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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