CVE-2026-85921
highDouble free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
Vendor / product: Microsoft — windows 11 26h1
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
CVSS
8.2
8.2 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (secure@microsoft.com)
Timeline (UTC)
Published: 2026-09-14 18:20
Modified: 2026-09-29 19:24
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 06:53 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / windows_11_26h1 <10.0.28000.2956
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85921
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85921
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85921 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:53 UTC · record ↗