CVE-2023-2283: Fedoraproject Fedora

Medium severity, CVSS 6.5. EPSS: 1.1% chance of exploitation in the next 30 days.

A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.

Affected products

• Fedoraproject Fedora: version 37 only
• Libssh Libssh: from 0.9.1, up to and including 0.9.6; from 0.10.0, up to and including 0.10.4
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2023-05-26. Last modified 2026-06-17.