CVE-2026-40402: windows 11 23h2 vulnerability

Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
CVE-2026-40402CVSS 9.3Windows

CVE-2026-40402: windows 11 23h2 vulnerability

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

CVSS
9.3 CRITICAL
EPSS
25.17%
Known exploited
not in KEV
Product
windows 11 23h2

What is known

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

Sources