ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is 8.9.
{ "ubuntu_priority": "low", "priority_reason": "Only affects configurations using agent forwarding, smartcard keys, and per-hop destination constraints. Policy bypass only.", "availability": "No subscription required", "binaries": [ { "binary_name": "openssh-client", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "openssh-client-dbgsym", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "openssh-server", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "openssh-server-dbgsym", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "openssh-sftp-server", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "openssh-sftp-server-dbgsym", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "openssh-tests", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "openssh-tests-dbgsym", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "ssh", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "ssh-askpass-gnome", "binary_version": "1:8.9p1-3ubuntu0.5" }, { "binary_name": "ssh-askpass-gnome-dbgsym", "binary_version": "1:8.9p1-3ubuntu0.5" } ] }