Last Modified: Dec 12, 2025
Affected Product(s):
F5OS F5OS-A, Install/Upgrade
Known Affected Versions:
F5OS-A 1.8.0, F5OS-A 1.8.3
Opened: Dec 02, 2025 Severity: 3-Major
If a weak SSH MAC algorithm is configured (via "system security services service sshd"), K3s will fail to install.
This can prevent upgrades or K3s reinstallations.
-- Appliance. -- Weak SSH MAC algorithm configured.
Configure a strong SSH MAC algorithm, e.g. hmac-sha2-256. In the CLI: config system security services service sshd config macs [ hmac-sha2-256 ] commit It is possible to configure multiple MAC algorithms, in which case the administrator should keep the stronger algorithms enabled as well.
None