The Percona Server 5.6.44-85.0-1 packages for Debian and Ubuntu suffered an issue where the server would reset the root password to a blank value upon an upgrade. This was fixed in 5.6.44-85.0-2.
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HPercona Server
APPPercona5.6.44-85.0-1
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CHECK WITH VENDOR
No clear patch data available. Check vendor references.
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