Provide references for CVE-2020-12439.
Where can I find more information about CVE-2020-12439?
References are available at: https://github.com/mimblewimble/grin/pull/3236, https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md, https://github.com/mimblewimble/grin/issues/3235.