CVE-2026-85921
Windows Secure Kernel Mode Elevation of Privilege Vulnerability
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Secure Kernel Mode Elevation of Privilege Vulnerability
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-85921- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-415
- Updated
- 2026-11-10
EUVDEUVD-2026-77686
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
- Record
EUVD-2026-77686- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-2q4x-w73p-vjf4
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges...
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
- Record
GHSA-2q4x-w73p-vjf4- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-415
- Updated
- 2026-11-02
NVD
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-85921- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-415
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-85921 is a high vulnerability (CVSS 8.2) in Microsoft Windows 11 Version 26h1, published September 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 28th percentile. No source names a fixed version.