Provide references for CVE-2021-3909.
Where can I find more information about CVE-2021-3909?
References are available at: https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244, https://www.debian.org/security/2021/dsa-5033, https://www.debian.org/security/2022/dsa-5041.