CVE-2018-20781
In pam/gkr-pam-module.c in GNOME Keyring before 3.27.2, the user’s password is kept in a session-child process spawned from the LightDM daemon. This can expose the credential in cleartext.
Date published : 2019-02-12
https://bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/1772919