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Windows Hyper-V

CVE-2019-0928 — Windows Hyper-V Denial of Service Vulnerability

Important CVSS 6.2 EPSS 0.01721 2019-09 archive

Executive Summary

A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate input from a privileged user on a guest operating system. To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application that causes a host machine to crash. To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application. The security update addresses the vulnerability by resolving a number of conditions where Hyper-V would fail to prevent a guest operating system from sending malicious requests.

Overview

6.2
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
N/A
MS Exploit Likelihood
Category Denial of Service
Released Sep 10 2019
Last Updated Sep 10 2019
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01721 — 0.7513 percentile
NVD CVSS 6.2 MEDIUM — differs from MSRC

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Adjacent_network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
High
USER INTERACTION
None
SCOPE
Changed
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.9

EPSS Score

0.01721
probability of exploitation in the next 30 days
0.7513 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

8 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for x64-based Systems 4516070 (Security Update) Important Denial of Service Yes
Windows 10 Version 1607 for x64-based Systems 4516044 (Security Update) Important Denial of Service Yes
Windows 10 Version 1703 for x64-based Systems 4516068 (Security Update) Important Denial of Service Yes
Windows 10 Version 1709 for x64-based Systems 4516066 (Security Update) Important Denial of Service Yes
Windows 10 Version 1803 for x64-based Systems 4516058 (Security Update) Important Denial of Service Yes
Windows Server 2016 4516044 (Security Update) Important Denial of Service Yes
Windows Server 2016 (Server Core installation) 4516044 (Security Update) Important Denial of Service Yes
Windows Server, version 1803 (Server Core Installation) 4516058 (Security Update) Important Denial of Service Yes

Patches

5 patches
Article Type Restart
4516070 Security Update Yes
4516044 Security Update Yes
4516068 Security Update Yes
4516066 Security Update Yes
4516058 Security Update Yes

Known Exploits

Acknowledgments

None

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