7.8
High
CVE-2026-70023 Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally
Description
Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 Version 1809 10.0 | 10.0.17763.0 → < 10.0.17763.9376 | 10.0.17763.9376 |
| Windows 10 Version 21H2 10.0 | 10.0.19044.0 → < 10.0.19044.7807 | 10.0.19044.7807 |
| Windows 10 Version 22H2 10.0 | 10.0.19045.0 → < 10.0.19045.7807 | 10.0.19045.7807 |
| Windows 11 Version 23H2 10.0 | 10.0.22631.0 → < 10.0.22631.7652 | 10.0.22631.7652 |
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.9711 | 10.0.26100.9711 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.9711 | 10.0.26200.9711 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.3231 | 10.0.28000.3231 |
| Windows 11 Version 26H2 10.0 | 10.0.26300.0 → < 10.0.26300.9711 | 10.0.26300.9711 |
| Windows Server 2019 10.0 | 10.0.17763.0 → < 10.0.17763.9376 | 10.0.17763.9376 |
Show the 4 other branches Hide the 4 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.17763.0 → < 10.0.17763.9376 | 10.0.17763.9376 |
| Windows Server 2022 10.0 | 10.0.20348.0 → < 10.0.20348.5761 | 10.0.20348.5761 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.33650 | 10.0.26100.33650 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.33650 | 10.0.26100.33650 |
References
- Windows Hyper-V Elevation of Privilege Vulnerability msrc.microsoft.com
Timeline
- Published
- Last modified
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