Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – < 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – < 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – < 10.0.19044.6809 | 10.0.19044.6809 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – < 10.0.19045.6809 | 10.0.19045.6809 |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 – < 10.0.22631.6491 | 10.0.22631.6491 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – < 10.0.26100.7623 | 10.0.26100.7623 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – < 10.0.26200.7623 | 10.0.26200.7623 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0 – < 6.1.7601.28117 | 6.1.7601.28117 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0 – < 6.1.7601.28117 | 6.1.7601.28117 |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 – < 6.0.6003.23717 | 6.0.6003.23717 |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0 – < 6.0.6003.23717 | 6.0.6003.23717 |
| Microsoft | Windows Server 2012 | 6.2.9200.0 – < 6.2.9200.25868 | 6.2.9200.25868 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 – < 6.2.9200.25868 | 6.2.9200.25868 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – < 6.3.9600.22968 | 6.3.9600.22968 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – < 6.3.9600.22968 | 6.3.9600.22968 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – < 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – < 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.4648 | 10.0.20348.4648 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – < 10.0.25398.2092 | 10.0.25398.2092 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.32230 | 10.0.26100.32230 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.32230 | 10.0.26100.32230 |
Advisories 3
- NCSC-2026-0007 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Apr 10, 2026
- WID-SEC-2026-0083 Microsoft Windows : Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 2, 2026
- MSRC-CVE-2026-20869 Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability Microsoft Security Response Center · Jan 13, 2026
References
- Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability vendor-advisory patch