Role: Windows Hyper-V
CVE-2025-29955 — Windows Hyper-V Denial of Service Vulnerability
Executive Summary
Improper input validation in Windows Hyper-V allows an unauthorized attacker to deny service locally.
Overview
5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.4
EPSS Score
0.00543
probability of exploitation in the next 30 days
0.42916 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
1 affected product
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 11 Version 24H2 for x64-based Systems 5058411 (Security Update) 5058497 (SecurityHotpatchUpdate) Important Denial of Service 5055523 Base: 6.2 Temporal: 5.4 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 10.0.26100.4061 10.0.26100.3981 Yes None Windows Server 2022, 23H2 Edition (Server Core installation) | 5058384 (Security Update) |
Important | Denial of Service | Yes |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
5058384 |
Security Update | Yes |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
MORSE with Microsoft
References
On This Page