Provide references for CVE-2021-3709.
Where can I find more information about CVE-2021-3709?
References are available at: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3709, https://ubuntu.com/security/notices/USN-5077-1, https://ubuntu.com/security/notices/USN-5077-2, https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1934308.