CVE-2026-20920: CWE-416: Use After Free in Microsoft Windows 11 version 22H3
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Windows Win32K ICOMP component on Windows 11 version 22H3. An authorized attacker with local access can exploit this flaw to elevate privileges, potentially gaining higher system rights. The CVSS 3.1 vector indicates low attack complexity and privileges required, no user interaction needed, and high impact on confidentiality, integrity, and availability. Microsoft has released a patch to remediate this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining administrative control over the affected Windows 11 system. This can lead to full system compromise including unauthorized access to sensitive data and disruption of system availability.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 11 version 22H3 (build 10.0.22631.0) to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-20920: CWE-416: Use After Free in Microsoft Windows 11 version 22H3
Description
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Windows Win32K ICOMP component on Windows 11 version 22H3. An authorized attacker with local access can exploit this flaw to elevate privileges, potentially gaining higher system rights. The CVSS 3.1 vector indicates low attack complexity and privileges required, no user interaction needed, and high impact on confidentiality, integrity, and availability. Microsoft has released a patch to remediate this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining administrative control over the affected Windows 11 system. This can lead to full system compromise including unauthorized access to sensitive data and disruption of system availability.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 11 version 22H3 (build 10.0.22631.0) to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-04T20:04:16.335Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae3a60475309f9ae1c0
Added to database: 1/13/2026, 6:11:47 PM
Last enriched: 4/3/2026, 12:49:05 PM
Last updated: 5/8/2026, 10:14:49 PM
Views: 106
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