Medium · published July 21, 2026
A flaw was found in libssh. During SFTP server directory listing, the longname field is constructed with unsafe concatenation into a fixed-size stack buffer. When a client causes the server to list attacker-controlled filenames, sufficiently long names can overflow that stack buffer and may lead to crashes or possible code execution on the server.
| Product | Versions | Fixed in |
|---|---|---|
| libssh/libssh | ≥ 0.11.0, < 0.11.5 | 0.11.5 |
| libssh/libssh | all versions | — |
| redhat/hardened_images | all versions | — |
| redhat/enterprise_linux | all versions | — |
| redhat/enterprise_linux | all versions | — |
| redhat/enterprise_linux | all versions | — |
| redhat/enterprise_linux_for_power_little_endian | all versions | — |
| redhat/enterprise_linux_for_power_little_endian | all versions | — |
| redhat/enterprise_linux_for_power_little_endian_els | all versions | — |
| redhat/enterprise_linux_for_power_little_endian_eus | all versions | — |
| redhat/enterprise_linux | all versions | — |
| redhat/enterprise_linux | all versions | — |
| redhat/enterprise_linux_for_els | all versions | — |
| redhat/enterprise_linux_for_els | all versions | — |
| redhat/enterprise_linux_for_eus | all versions | — |
| redhat/enterprise_linux_for_ibm_z_systems_eus | all versions | — |
| redhat/enterprise_linux_for_eus | all versions | — |
| redhat/enterprise_linux_for_ibm_z_systems | all versions | — |
| redhat/enterprise_linux_for_ibm_z_systems | all versions | — |
| redhat/enterprise_linux_for_ibm_z_systems_els | all versions | — |