Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Weakness
The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Windows_10_1607 | Microsoft | * | 10.0.14393.8783 (excluding) |
| Windows_10_1809 | Microsoft | * | 10.0.17763.8276 (excluding) |
| Windows_10_21h2 | Microsoft | * | 10.0.19044.6809 (excluding) |
| Windows_10_22h2 | Microsoft | * | 10.0.19045.6809 (excluding) |
| Windows_11_23h2 | Microsoft | * | 10.0.22631.6491 (excluding) |
| Windows_11_24h2 | Microsoft | * | 10.0.26100.7623 (excluding) |
| Windows_11_25h2 | Microsoft | * | 10.0.26200.7623 (excluding) |
| Windows_server_2008 | Microsoft | –sp2 (including) | –sp2 (including) |
| Windows_server_2008 | Microsoft | r2-sp1 (including) | r2-sp1 (including) |
| Windows_server_2012 | Microsoft | - (including) | - (including) |
| Windows_server_2012 | Microsoft | r2 (including) | r2 (including) |
| Windows_server_2016 | Microsoft | * | 10.0.14393.8783 (excluding) |
| Windows_server_2019 | Microsoft | * | 10.0.17763.8276 (excluding) |
| Windows_server_2022 | Microsoft | * | 10.0.20348.4648 (excluding) |
| Windows_server_2022_23h2 | Microsoft | * | 10.0.25398.2092 (excluding) |
| Windows_server_2025 | Microsoft | * | 10.0.26100.32230 (excluding) |