/proc/tty/driver/serial in Linux 2.4.x reveals the exact number of characters used in serial links, which could allow local users to obtain potentially sensitive information such as the length of passwords.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux | Redhat | 7.1 (including) | 7.1 (including) |
| Linux | Redhat | 7.2 (including) | 7.2 (including) |
| Linux | Redhat | 7.3 (including) | 7.3 (including) |
| Linux | Redhat | 8.0 (including) | 8.0 (including) |
| Linux | Redhat | 9.0 (including) | 9.0 (including) |