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MSRC compact vulnerability detail

CVE-2026-20863 · Win32k Elevation of Privilege Vulnerability

Double free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

Severity
Important
Impact
Elevation of Privilege
CVSS
7.0 base · 6.1 temporal
Release
2026-01-13
Signals
Windows Win32K - ICOMP Elevation of Privilege Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-415: Double Free
Patch Diff
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Description
Double free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
FAQ / Articles
Windows Win32K - ICOMP Elevation of Privilege Vulnerability
Double free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
FAQ
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to win a race condition.
FAQ
What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.