CVE-2026-85921

EUVD-2026-77686
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.2 HIGH
LOCAL
LOW
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 28.43%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_11_26h1
𝑥
< 10.0.28000.2956
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows 11
26H1 (arm64, x64)
KB5129194
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85921