The undocumented semconfig system call in BSD freezes the state of semaphores, which allows local users to cause a denial of service of the semaphore system by using the semconfig call.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Freebsd | Freebsd | 3.1 | 3.1 |
| Freebsd | Freebsd | 2.2.5 | 2.2.5 |
| Netbsd | Netbsd | 1.4.2 | 1.4.2 |
| Netbsd | Netbsd | 1.4.2 | 1.4.2 |
| Freebsd | Freebsd | 2.2.2 | 2.2.2 |
| Netbsd | Netbsd | 1.4.2 | 1.4.2 |
| Freebsd | Freebsd | 2.2.3 | 2.2.3 |
| Freebsd | Freebsd | 2.0.5 | 2.0.5 |
| Freebsd | Freebsd | 1.1.5.1 | 1.1.5.1 |
| Netbsd | Netbsd | 1.4.2 | 1.4.2 |
| Netbsd | Netbsd | 1.4.1 | 1.4.1 |
| Freebsd | Freebsd | 2.2.8 | 2.2.8 |
| Freebsd | Freebsd | 2.1.6.1 | 2.1.6.1 |
| Freebsd | Freebsd | 2.2 | 2.2 |
| Freebsd | Freebsd | 3.0 | 3.0 |
| Freebsd | Freebsd | 3.2 | 3.2 |
| Freebsd | Freebsd | 2.2.4 | 2.2.4 |
| Freebsd | Freebsd | 2.1.0 | 2.1.0 |
| Freebsd | Freebsd | 2.2.6 | 2.2.6 |
| Freebsd | Freebsd | 2.1.6 | 2.1.6 |
| Freebsd | Freebsd | 2.1.7.1 | 2.1.7.1 |
| Freebsd | Freebsd | 3.3 | 3.3 |
| Freebsd | Freebsd | 4.0 | 4.0 |
| Freebsd | Freebsd | 3.4 | 3.4 |
| Freebsd | Freebsd | 5.0 | 5.0 |
| Netbsd | Netbsd | 1.4.1 | 1.4.1 |
| Freebsd | Freebsd | 5.0 | 5.0 |
| Freebsd | Freebsd | 2.1.5 | 2.1.5 |
| Freebsd | Freebsd | 4.0 | 4.0 |
| Netbsd | Netbsd | 1.4.1 | 1.4.1 |
| Freebsd | Freebsd | 2.0 | 2.0 |