Severity by source
AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Microsoft Windows 11 version 26H1 stems from a double-free (CWE-415) in Secure Kernel Mode that lets a locally authenticated attacker holding high privileges corrupt kernel memory and reach an execution context above the normal kernel boundary. Successful exploitation yields complete loss of confidentiality, integrity, and availability for the affected component and the assets it protects (CVSS 8.2, S:C), effectively bypassing VBS-backed protections. …
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Same weakness CWE-415 – Double Free
View allSame technique Information Disclosure
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-77686
GHSA-2q4x-w73p-vjf4