CVE-2026-20863 — Double Free in Microsoft Windows 11 Version 22h3

CWE-415 — Double Free5 documents5 sources
Severity
7.0HIGHNVD
EPSS
0.0%
top 90.96%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
10
Microsoft Windows 11 Version 22h3Microsoft Windows 11 Version 23h2Microsoft Windows 11 Version 24h2+7 more
Timeline
PublishedJan 13

Description

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

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages10 packages

▶NVDmicrosoft/windows< 10.0.20348.4648+2
▶NVDmicrosoft/windows_11_23h2< 10.0.22631.6491
▶NVDmicrosoft/windows_11_24h2< 10.0.26100.7623
▶NVDmicrosoft/windows_11_25h2< 10.0.26200.7623
▶CVEListV5microsoft/windows_server_202210.0.20348.0 — 10.0.20348.4648

🔴Vulnerability Details

2
GHSA
GHSA-25wh-jjx3-jq6q: Double free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally↗2026-01-13
▶
CVEList
Win32k Elevation of Privilege Vulnerability↗2026-01-13
▶

📋Vendor Advisories

1
Microsoft
Win32k Elevation of Privilege Vulnerability↗2026-01-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20863 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-20863 — Double Free in Microsoft | cvebase