MEDIUM
A denial of service vulnerability exists when Microsoft Hyper-V Network Switch on a host server fails to properly validate input from a privileged user on a guest operating system, aka "Windows Hyper-V Denial of Service Vulnerability." This affects Windows Server 2012 R2, Windows RT 8.1, Windows Server 2016, Windows 8.1, Windows 10, Windows 10 Servers
Published Sep 13, 2018
6.8
MEDIUMCVSS 3.0
EPSS 7.17%
Description
A denial of service vulnerability exists when Microsoft Hyper-V Network Switch on a host server fails to properly validate input from a privileged user on a guest operating system, aka "Windows Hyper-V Denial of Service Vulnerability." This affects Windows Server 2012 R2, Windows RT 8.1, Windows Server 2016, Windows 8.1, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8436, CVE-2018-8437.
Affected products
-
- Version 32-bit SystemsStatusaffectedConstraints-
- Version Version 1607 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1607 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1703 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1703 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1709 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1709 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1803 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1803 for x64-based SystemsStatusaffectedConstraints-
- Version x64-based SystemsStatusaffectedConstraints-
- Version
-
- Version version 1709 (Server Core Installation)StatusaffectedConstraints-
- Version version 1803 (Server Core Installation)StatusaffectedConstraints-
- Version
-
- Version 32-bit systemsStatusaffectedConstraints-
- Version x64-based systemsStatusaffectedConstraints-
- Version
-
- Version Windows RT 8.1StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows 10 Servers | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows 8.1 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows RT 8.1 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2012 R2 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2016 | n/a |
|
OR
- n/a
- 1607
- 1709
- 1803
- n/a
- n/a
- 2012
- n/a
- 1709
- 1803
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
6.8 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
6.8 MEDIUM NVD
AV:N/AC:L/Au:S/C:N/I:N/A:C
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
7.17% 0.07165
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.07165
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.17% (0.07165) | 94.09th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.17% (0.07165) | 93.45th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.52% (0.00523) | 64.97th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.16% (0.00161) | 54.10th | v3 (v2023.03.01) |
| Jun 28, 2024 | 0.16% (0.00161) | 52.99th | v3 (v2023.03.01) |
| May 2, 2024 | 0.11% (0.00110) | 43.57th | v3 (v2023.03.01) |
| Feb 25, 2024 | 0.09% (0.00093) | 38.25th | v3 (v2023.03.01) |
| Feb 3, 2024 | 0.08% (0.00079) | 32.84th | v3 (v2023.03.01) |
| Jul 19, 2023 | 0.10% (0.00099) | 40.35th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.10% (0.00105) | 41.85th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.15% (0.00147) | 48.91th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.42% (0.01418) | 73.14th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.42% (0.01418) | 71.15th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.42% (0.01418) | 50.43th | v2 (v2022.01.01) |
| Feb 3, 2022 | 10.69% (0.10686) | 87.85th | v1 |
| Jan 6, 2022 | 10.69% (0.10686) | 87.71th | v1 |
| Sep 1, 2021 | 10.69% (0.10686) | 95.19th | v1 |
| Apr 14, 2021 | 10.69% (0.10686) | 0.00th | v1 |
Weaknesses (1)
References (3)
- http://www.securityfocus.com/bid/105249 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041624 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8438 x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105249 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041624 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8438 | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Sep 13, 2018
Updated Aug 5, 2024
Reserved Mar 14, 2018
Link CVE-2018-8438
CISA Vulnrichment
Updated n/a