CVE-2026-26179

Windows Kernel Elevation of Privilege Vulnerability

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

Affected

Microsoft · Windows 11 version 23H2 · Windows 11 Version 23H2 · Windows 11 Version 24H2 · Windows 11 Version 25H2 · Windows 11 version 26H1 · Windows Server 2022, 23H2 Edition (Server Core installation)

CVSS v3.1 MICROSOFT

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.33% chance of exploitation in the next 30 days, 25th percentile

Published

2026-04-14

Updated

2026-10-15

Proof-of-concept exploits (1)

• nikosecurity/CVE-2026-261791★ · 2026-06-05

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26179

References

• CVE Record
• NVD entry

Related

• CVE-2024-55511