7.8
High
CVE-2026-56176 Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally
Description
Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 Version 1607 10.0 | 10.0.14393.0 → < 10.0.14393.9339 | 10.0.14393.9339 |
| Windows 10 Version 1809 10.0 | 10.0.17763.0 → < 10.0.17763.9020 | 10.0.17763.9020 |
| Windows 10 Version 21H2 10.0 | 10.0.19044.0 → < 10.0.19044.7548 | 10.0.19044.7548 |
| Windows 10 Version 22H2 10.0 | 10.0.19045.0 → < 10.0.19045.7548 | 10.0.19045.7548 |
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.8875 | 10.0.26100.8875 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.8875 | 10.0.26200.8875 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.2525 | 10.0.28000.2525 |
| Windows Server 2012 6.2 | 6.2.9200.0 → < 6.2.9200.26226 | 6.2.9200.26226 |
| Windows Server 2012 (Server Core installation) 6.2 | 6.2.9200.0 → < 6.2.9200.26226 | 6.2.9200.26226 |
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| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2012 R2 6.3 | 6.3.9600.0 → < 6.3.9600.23291 | 6.3.9600.23291 |
| Windows Server 2012 R2 (Server Core installation) 6.3 | 6.3.9600.0 → < 6.3.9600.23291 | 6.3.9600.23291 |
| Windows Server 2016 10.0 | 10.0.14393.0 → < 10.0.14393.9339 | 10.0.14393.9339 |
| Windows Server 2016 (Server Core installation) 10.0 | 10.0.14393.0 → < 10.0.14393.9339 | 10.0.14393.9339 |
| Windows Server 2019 10.0 | 10.0.17763.0 → < 10.0.17763.9020 | 10.0.17763.9020 |
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.17763.0 → < 10.0.17763.9020 | 10.0.17763.9020 |
| Windows Server 2022 10.0 | 10.0.20348.0 → < 10.0.20348.5386 | 10.0.20348.5386 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.33158 | 10.0.26100.33158 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.33158 | 10.0.26100.33158 |
| Microsoft Office 365 for Mac 1.0 | 1.0.0 → < 16.111.26071215 | 16.111.26071215 |
| Microsoft Office for Android 16.0 | 16.0.1 → < 16.0.20228.20042 | 16.0.20228.20042 |
| Microsoft Office LTSC for Mac 2021 16.0 | 16.0.1 → < 16.111.26071215 | 16.111.26071215 |
| Microsoft Office LTSC for Mac 2024 16.0 | 16.0.0 → < 16.111.26071215 | 16.111.26071215 |
References
- Windows Win32k Elevation of Privilege Vulnerability msrc.microsoft.com
Timeline
- Published
- Last modified
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