Oct 2026: Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerabili
CVE-2026-96949 Published on October 13, 2026

Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
Use after free in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to elevate privileges locally.

Vendor Advisory NVD

Weakness Type

What is a Race Condition Vulnerability?

The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

CVE-2026-96949 has been classified to as a Race Condition vulnerability or weakness.

Products Associated with CVE-2026-96949

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Microsoft Windows Server 2012

Microsoft Windows Server 2012 R2

Microsoft Windows 10

Microsoft Windows Server 2016

Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows 11 23h2

Microsoft Windows 11 24h2

Microsoft Windows 11 25h2

Microsoft Windows 11 Version 26h2 Arm64 Based Systems

Microsoft Windows Server 2025

Microsoft Windows 11 26h1

Affected Versions

Microsoft Windows 10 Version 1607:

Version 10.0.14393.0 and below 10.0.14393.9612 is affected.

Microsoft Windows 10 Version 1809:

Version 10.0.17763.0 and below 10.0.17763.9376 is affected.

Microsoft Windows 10 Version 21H2:

Version 10.0.19044.0 and below 10.0.19044.7807 is affected.

Microsoft Windows 10 Version 22H2:

Version 10.0.19045.0 and below 10.0.19044.7807 is affected.

Microsoft Windows 11 version 23H2:

Version 10.0.22631.0 and below 10.0.22631.7652 is affected.

Microsoft Windows 11 Version 23H2:

Version 10.0.22631.0 and below 10.0.22631.7652 is affected.

Microsoft Windows 11 Version 24H2:

Version 10.0.26100.0 and below 10.0.26100.9711 is affected.

Microsoft Windows 11 Version 25H2:

Version 10.0.26200.0 and below 10.0.26200.9711 is affected.

Microsoft Windows 11 version 26H1:

Version 10.0.28000.0 and below 10.0.28000.3231 is affected.

Microsoft Windows 11 Version 26H2:

Version 10.0.26300.0 and below 10.0.26300.9711 is affected.

Microsoft Windows Server 2012:

Version 6.2.9200.0 and below 6.2.9200.26434 is affected.

Microsoft Windows Server 2012 (Server Core installation):

Version 6.2.9200.0 and below 6.2.9200.26434 is affected.

Microsoft Windows Server 2012 R2:

Version 6.3.9600.0 and below 6.3.9600.23470 is affected.

Microsoft Windows Server 2012 R2 (Server Core installation):

Version 6.3.9600.0 and below 6.3.9600.23470 is affected.

Microsoft Windows Server 2016:

Version 10.0.14393.0 and below 10.0.14393.9612 is affected.

Microsoft Windows Server 2016 (Server Core installation):

Version 10.0.14393.0 and below 10.0.14393.9612 is affected.

Microsoft Windows Server 2019:

Version 10.0.17763.0 and below 10.0.17763.9376 is affected.

Microsoft Windows Server 2019 (Server Core installation):

Version 10.0.17763.0 and below 10.0.17763.9376 is affected.

Microsoft Windows Server 2022:

Version 10.0.20348.0 and below 10.0.20348.5761 is affected.

Microsoft Windows Server 2025:

Version 10.0.26100.0 and below 10.0.26100.33650 is affected.

Microsoft Windows Server 2025 (Server Core installation):

Version 10.0.26100.0 and below 10.0.26100.33650 is affected.

Oct 2026: Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege VulnerabiliCVE-2026-96949 Published on October 13, 2026

Weakness Type

What is a Race Condition Vulnerability?

Products Associated with CVE-2026-96949

Affected Versions

Oct 2026: Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerabili
CVE-2026-96949 Published on October 13, 2026