Provide references for CVE-2015-6818.
Where can I find more information about CVE-2015-6818?
References are available at: http://www.ubuntu.com/usn/USN-2944-1, https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html, http://www.securitytracker.com/id/1033483, http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=47f4e2d8960ca756ca153ab8e3e93d80449b8c91, http://ffmpeg.org/security.html.