Provide references for CVE-2018-20786.
Where can I find more information about CVE-2018-20786?
References are available at: https://github.com/vim/vim/commit/cd929f7ba8cc5b6d6dcf35c8b34124e969fed6b8, https://github.com/vim/vim/issues/3711, https://usn.ubuntu.com/4309-1/.