CVE-2026-61368

Windows Hyper-V Information Disclosure Vulnerability

State: Published
Severity: 5.0 Medium
Published: Aug 11, 2026
Updated: Oct 30, 2026
Reserved: Jul 8, 2026

Description

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to disclose information locally.

Scores

CVSS	Score	Vector	Source
3.1	5.0 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
Windows 10 Version 1607Microsoft	10.0.14393.0 to before 10.0.14393.9418Affected
Windows 10 Version 1809Microsoft	10.0.17763.0 to before 10.0.17763.9121Affected
Windows 10 Version 21H2Microsoft	10.0.19044.0 to before 10.0.19044.7663Affected
Windows 10 Version 22H2Microsoft	10.0.19045.0 to before 10.0.19045.7663Affected
Windows 11 version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.7517Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.7517Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.9168Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.9168Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.2704Affected
Windows Server 2016Microsoft	10.0.14393.0 to before 10.0.14393.9418Affected
Windows Server 2016 (Server Core installation)Microsoft	10.0.14393.0 to before 10.0.14393.9418Affected
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.9121Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.9121Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.5499Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.33296Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.33296Affected

References

Windows Hyper-V Information Disclosure Vulnerabilityvendor-advisorypatch

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