CVE-2026-40402 PUBLISHED

Windows Hyper-V Elevation of Privilege Vulnerability

Assigner: microsoft
Reserved: 13.04.2026 Published: 12.05.2026 Updated: 13.05.2026

Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.

Metrics

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS Score: 9.3

Product Status

Vendor Microsoft
Product Windows 11 version 22H3
Versions
  • affected from 10.0.22631.0 to 10.0.22631.7079 (excl.)
Vendor Microsoft
Product Windows 11 Version 23H2
Versions
  • affected from 10.0.22631.0 to 10.0.22631.7079 (excl.)
Vendor Microsoft
Product Windows Server 2022
Versions
  • affected from 10.0.20348.0 to 10.0.20348.5139 (excl.)

References

Problem Types