Use-after-free in Microsoft Windows and Windows Server - CVE-2026-118215
Published: November 11, 2026
Vulnerability identifier: #VU165059
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-118215
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges locally.
The vulnerability exists due to use-after-free in Windows Advanced Rasterization Platform when previously freed memory is accessed. A local user can use complex memory shaping techniques to exploit the flaw and perform actions within the isolated graphics compilation service's security context, outside the user's own AppContainer.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-118215
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7807, 10 22H2 10.0.19045.7807, 10 1809 10.0.17763.9376, 11 23H2 10.0.22631.7652, 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231
Windows Server - addressed in versions 2019 10.0.17763.9376, 2022 10.0.20348.5761, 2025 10.0.26100.33650
Windows Server - addressed in versions 2019 10.0.17763.9376, 2022 10.0.20348.5761, 2025 10.0.26100.33650