/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) |
| Red Hat Enterprise Linux 3 | RedHat | kernel-0:2.4.21-15.EL | * |
| Red Hat Enterprise Linux AS (Advanced Server) version 2.1 | RedHat | * | |
| Red Hat Linux 7.1 | RedHat | * | |
| Red Hat Linux 7.2 | RedHat | * | |
| Red Hat Linux 7.3 | RedHat | * | |
| Red Hat Linux 8.0 | RedHat | * | |
| Red Hat Linux 9 | RedHat | * | |
| Kernel-source-2.4.27 | Ubuntu | dapper | * |
| Kernel-source-2.4.27 | Ubuntu | edgy | * |