CVE-2025-62567 — Windows Hyper-V Denial of Service Vulnerability

Executive Summary

Integer underflow (wrap or wraparound) in Windows Hyper-V allows an authorized attacker to deny service over a network.

Overview

5.3

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

Exploitation Unlikely

MS Exploit Likelihood

Category Denial of Service

Weakness CWE-191: Integer Underflow (Wrap or Wraparound)

Released Dec 9 2025

Last Updated Dec 9 2025

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00972 — 0.58327 percentile

NVD CVSS 5.3 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

ATTACK VECTOR

Network

ATTACK COMPLEXITY

High

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: 4.6

EPSS Score

0.00972

probability of exploitation in the next 30 days

0.58327 percentile - updated 2026-07-25

View on FIRST.org

Affected Products

13 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 Version 1607 for x64-based Systems	`5071543 (Security Update)`	Important	Denial of Service	Yes
Windows 10 Version 1809 for x64-based Systems	`5071544 (Security Update)`	Important	Denial of Service	Yes
Windows 10 Version 21H2 for x64-based Systems	`5071546 (Security Update)`	Important	Denial of Service	Yes
Windows 10 Version 22H2 for x64-based Systems	`5071546 (Security Update)`	Important	Denial of Service	Yes
Windows 11 Version 23H2 for ARM64-based Systems	`5071417 (Security Update)`	Important	Denial of Service	Yes
Windows 11 Version 23H2 for x64-based Systems	`5071417 (Security Update)`	Important	Denial of Service	Yes
Windows 11 Version 24H2 for ARM64-based Systems 5072033 (Security Update) 5072014 (Security Hotpatch Update) Important Denial of Service 5068861 5068966 Base: 5.3 Temporal: 4.6 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 10.0.26100.7462 10.0.26100.7392 Yes None Windows 11 Version 24H2 for x64-based Systems 5072033 (Security Update) 5072014 (Security Hotpatch Update) Important Denial of Service 5068861 5068966 Base: 5.3 Temporal: 4.6 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 10.0.26100.7462 10.0.26100.7392 Yes None Windows 11 Version 25H2 for ARM64-based Systems 5072033 (Security Update) 5072014 (Security Hotpatch Update) Important Denial of Service 5068861 5068966 Base: 5.3 Temporal: 4.6 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 10.0.26200.7462 10.0.26200.7392 Yes None Windows 11 Version 25H2 for x64-based Systems 5072033 (Security Update) 5072014 (Security Hotpatch Update) Important Denial of Service 5068861 5068966 Base: 5.3 Temporal: 4.6 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 10.0.26200.7462 10.0.26200.7392 Yes None Windows Server 2012 R2	`5071503 (Monthly Rollup)`	Important	Denial of Service	Yes
Windows Server 2012 R2 (Server Core installation)	`5071503 (Monthly Rollup)`	Important	Denial of Service	Yes
Windows Server 2016	`5071543 (Security Update)`	Important	Denial of Service	Yes
Windows Server 2016 (Server Core installation)	`5071543 (Security Update)`	Important	Denial of Service	Yes
Windows Server 2019	`5071544 (Security Update)`	Important	Denial of Service	Yes
Windows Server 2019 (Server Core installation)	`5071544 (Security Update)`	Important	Denial of Service	Yes
Windows Server 2022 5071547 (Security Update) 5071413 (Security Hotpatch Update) Important Denial of Service 5068787 5068840 Base: 5.3 Temporal: 4.6 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 10.0.20348.4529 10.0.20348.4467 Yes None Windows Server 2022 (Server Core installation) 5071547 (Security Update) 5071413 (Security Hotpatch Update) Important Denial of Service 5068787 5068840 Base: 5.3 Temporal: 4.6 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 10.0.20348.4529 10.0.20348.4467 Yes None Windows Server 2022, 23H2 Edition (Server Core installation)	`5071542 (Security Update)`	Important	Denial of Service	Yes

Patches

6 patches

Article	Type	Restart
`5071543`	Security Update	Yes
`5071544`	Security Update	Yes
`5071546`	Security Update	Yes
`5071417`	Security Update	Yes
`5071503`	Monthly Rollup	Yes
`5071542`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Mitchell Turner
https://x.com/33y0re Connor McGarr with https://www.preludesecurity.com Prelude Research

References

MSRC Advisory MITRE NVD