A flaw was discovered in gdm 3.24.1 where gdm greeter was no longer setting the ran_once boolean during autologin. If autologin was enabled for a victim, an attacker could simply select 'login as another user' to unlock their screen.
{ "versions": [ { "introduced": "0" }, { "last_affected": "3.24.1" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-12164.json"