CVE-2026-27907: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 11 version 22H3
Integer underflow (wrap or wraparound) in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves an integer underflow (wrap or wraparound) in the Windows Storage Spaces Controller on Windows 11 version 22H3 (build 10.0.22631.0). Exploitation requires local access with some level of privilege and does not require user interaction. Successful exploitation could lead to elevation of privileges, impacting confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker could exploit this integer underflow to elevate their privileges on the affected Windows 11 system, potentially gaining higher-level access than intended. This could compromise system confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27907 to remediate this vulnerability.
CVE-2026-27907: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 11 version 22H3
Description
Integer underflow (wrap or wraparound) in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 11 version 22H3
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2022, 23H2 Edition (Server Core installation)
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer underflow (wrap or wraparound) in the Windows Storage Spaces Controller on Windows 11 version 22H3 (build 10.0.22631.0). Exploitation requires local access with some level of privilege and does not require user interaction. Successful exploitation could lead to elevation of privileges, impacting confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker could exploit this integer underflow to elevate their privileges on the affected Windows 11 system, potentially gaining higher-level access than intended. This could compromise system confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27907 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-24T21:35:49.686Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27907","vendor":"Microsoft"}]
Threat ID: 69de7a1d82d89c981fd6a72e
Added to database: 04/14/2026, 17:32:13 UTC
Last enriched: 08/15/2026, 13:57:10 UTC
Last updated: 09/14/2026, 05:57:47 UTC
Views: 171
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