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) condition in the Windows Storage Spaces Controller on Windows 11 version 22H3 (build 10.0.22631.0). An authorized attacker with local access can exploit this flaw to elevate their privileges, potentially gaining higher-level permissions than intended. The vulnerability is tracked as CVE-2026-27907 and is classified under CWE-191. Microsoft has published an official patch to remediate the issue.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized local attacker to elevate their privileges, potentially leading to full system compromise including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 11 version 22H3 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27907 for detailed patching instructions.
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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer underflow (wrap or wraparound) condition in the Windows Storage Spaces Controller on Windows 11 version 22H3 (build 10.0.22631.0). An authorized attacker with local access can exploit this flaw to elevate their privileges, potentially gaining higher-level permissions than intended. The vulnerability is tracked as CVE-2026-27907 and is classified under CWE-191. Microsoft has published an official patch to remediate the issue.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized local attacker to elevate their privileges, potentially leading to full system compromise including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 11 version 22H3 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27907 for detailed patching instructions.
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: 4/14/2026, 5:32:13 PM
Last enriched: 5/19/2026, 10:37:06 AM
Last updated: 5/30/2026, 5:30:10 AM
Views: 56
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