CVE-2026-20863

CVSS v3 7.0 HIGH

7.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.0 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

D

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

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20863	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_11_23h2::::::::
	cpe:2.3:o:microsoft:windows_11_24h2::::::::
	cpe:2.3:o:microsoft:windows_11_25h2::::::::
	cpe:2.3:o:microsoft:windows_server_2022::::::::
	cpe:2.3:o:microsoft:windows_server_2022_23h2::::::::
	cpe:2.3:o:microsoft:windows_server_2025::::::::

History

15 Jan 2026, 15:34

Type	Values Removed	Values Added
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20863 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20863 - Vendor Advisory
CPE		cpe:2.3:o:microsoft:windows_11_25h2:::::::: cpe:2.3:o:microsoft:windows_server_2022:::::::: cpe:2.3:o:microsoft:windows_server_2025:::::::: cpe:2.3:o:microsoft:windows_11_23h2:::::::: cpe:2.3:o:microsoft:windows_server_2022_23h2:::::::: cpe:2.3:o:microsoft:windows_11_24h2::::::::
First Time		Microsoft windows 11 23h2 Microsoft windows Server 2022 23h2 Microsoft windows 11 24h2 Microsoft windows Server 2022 Microsoft windows 11 25h2 Microsoft Microsoft windows Server 2025

13 Jan 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-13 18:16

Updated : 2026-01-15 15:34

NVD link : CVE-2026-20863

Mitre link : CVE-2026-20863

CVE.ORG link : CVE-2026-20863

JSON object : View

Products Affected

CWE

CWE-415

Double Free

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