CVE-2026-83634: Windows BitLocker Elevation of Privilege Vulnerability
Double free 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 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648
Event History
Frequently Asked Questions
Who is exposed to exploitation?
Systems running the listed Microsoft Windows 11, Windows Server 2025, or Windows Server 2022 products may be exposed. Exploitation is local, so an attacker must be able to run code on the affected system.
What level of access does an attacker need?
The attacker must already be authorized and have low-level local privileges. No user interaction is required.
What is the likely impact if exploitation succeeds?
Successful exploitation allows local elevation of privilege and may affect confidentiality, integrity, and availability at a high impact level.