CVE-2026-70144: Windows Win32k Elevation of Privilege Vulnerability
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
Other sources
Windows Win32k Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running Microsoft Windows 11 or Microsoft Windows Server 2025 are listed as affected. Exploitation is local, so an attacker must already be able to run code on the target system as an authorized user.
What level of access does an attacker need?
The attacker needs low privileges and local access. No user interaction is required, but the attack complexity is rated high.
What could successful exploitation allow?
Successful exploitation can elevate an authorized local attacker’s privileges. The vulnerability is rated as having high impact on confidentiality, integrity, and availability.