CVE-2023-1667: Debian Linux

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.

Affected products

• Debian Debian Linux: version 10.0 only
• 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.