I have created a new post to make the timeline easier to follow. As before it will be updated throughout the year with any details of the Flash vulnerabilities being exploited.
9th January: Adobe releases Flash Player v22.214.171.124 resolving 1 CVE.
Update: 10th January 2018: The timeline was updated to add the Adobe Flash Player update for January 2018. At the time of writing no exploits for the issue fixed by this update are known to be taking place.
Update: 13th February 2018: The timeline was updated to add the Adobe Flash Player update for February. One of these vulnerabilities CVE-2018-2878 is a zero day (defined) vulnerability being exploited in targeted attacks.