CVE-2026-85920: Windows BitLocker Elevation of Privilege Vulnerability
Time-of-check time-of-use (toctou) race condition in Windows BitLocker allows an authorized attacker to elevate privileges locally.
Other sources
Windows BitLocker 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 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running the listed Microsoft Windows 10, Windows 11, and Windows Server versions are in scope. Exploitation is local, so an attacker must already be able to run code on the affected machine.
What level of access does an attacker need?
The attacker must be authorized and have local low-privileged access. No user interaction is required for exploitation.
What is the likely impact if exploitation succeeds?
A successful race-condition exploit can elevate the attacker’s privileges locally. The reported impact includes high confidentiality, integrity, and availability effects.
Can this be exploited remotely?
No remote attack vector is indicated. The vulnerability is rated with a local attack vector, meaning exploitation requires access to the affected Windows system.