CVE-2026-96947: 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.
Other sources
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running the listed Microsoft Windows client or server products are potentially affected. Exploitation is local, so an attacker must be able to execute code on the target system.
What level of access does an attacker need?
The attacker must already be authorized on the affected machine and have low privileges. No user interaction is required for exploitation.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow local elevation of privilege. The vulnerability is rated high severity with impacts to confidentiality, integrity, and availability.
Is there evidence that this is being exploited in the wild?
The provided data marks exploit maturity as unknown. It does not provide evidence of active exploitation.