Provide references for CVE-2019-18786.
Where can I find more information about CVE-2019-18786?
References are available at: https://patchwork.linuxtv.org/patch/59542/, https://usn.ubuntu.com/4285-1/, https://usn.ubuntu.com/4287-1/, https://usn.ubuntu.com/4287-2/, https://usn.ubuntu.com/4284-1/.