Windows Common Log File System Driver Elevation of Privilege Vulnerability
CVE-2026-44809

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 24h2
Windows 11 Version 25h2
Windows 11 Version 26h1
Windows Server 2025
Vendor
CVE Published:
9 June 2026

What is CVE-2026-44809?

Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Affected Version(s)

Windows 11 Version 24H2 ARM64-based Systems 10.0.26100.0 < 10.0.26100.8655

Windows 11 Version 25H2 ARM64-based Systems 10.0.26200.0 < 10.0.26200.8655

Windows 11 version 26H1 ARM64-based Systems 10.0.28000.0 < 10.0.28000.2269

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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