CVE-2026-88141: CWE-416: Use After Free in Microsoft Windows 11 version 23H2
Description
CVE-2026-88141 is a use-after-free vulnerability in the Windows Kernel affecting Windows 11 version 23H2. It allows an authorized local attacker to elevate privileges. The vulnerability has a high severity rating and has been officially fixed by Microsoft. No known exploits are reported in the wild at this time.
CVSS v3.1
Score 7.0high
Affected software
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows 11 Version 26H2
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-88141) involves a use-after-free condition in the Windows Kernel of Windows 11 version 23H2. An authorized local attacker can exploit this flaw to elevate privileges on the affected system. The CVSS v3.1 base score is 7.0, indicating high severity, with attack vector local, high attack complexity, low privileges required, no user interaction, and impacts to confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher system privileges than intended. This can lead to full system compromise, including unauthorized access to sensitive data and disruption of system availability.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators should apply the latest security updates for Windows 11 version 23H2 as provided by Microsoft to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:53:00.398Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88141","vendor":"Microsoft"}]
Threat ID: 6ace855f2cdf04f6569ff904
Added to database: 10/13/2026, 19:24:15 UTC
Last enriched: 10/14/2026, 01:34:35 UTC
Last updated: 10/14/2026, 01:34:35 UTC
Views: 2
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