The Windows NT Client Server Runtime Subsystem (CSRSS) can be subjected to a denial of service when all worker threads are waiting for user input.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Windows_2000 | Microsoft | * | * |
| Windows_nt | Microsoft | * | * |
| Windows_nt | Microsoft | 4.0-sp5 (including) | 4.0-sp5 (including) |