CVE-2026-85921

Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

CVSS 3.1

8.2CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-25)

CWE

CWE-415

Published

2026-09-14

Modified

2026-09-29

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:windows_11_26h1

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85921

Check your stackJSON