Jan 2026: Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability
CVE-2026-20870 Published on January 13, 2026
Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-20870 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-20870
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-20870 are published in these products:
Affected Versions
Microsoft Windows 11 Version 24H2:- Version 10.0.26100.0 and below 10.0.26100.7623 is affected.
- Version 10.0.26200.0 and below 10.0.26200.7623 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32230 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32230 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.