/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.
| Software | From | Fixed in |
|---|---|---|
| redhat / linux | 7.2 | 7.2.x |
| redhat / linux | 8.0 | 8.0.x |
| redhat / linux | 7.3 | 7.3.x |
| redhat / linux | 9.0 | 9.0.x |
| redhat / linux | 7.1 | 7.1.x |