Provide references for CVE-2021-3997.
Where can I find more information about CVE-2021-3997?
References are available at: https://bugzilla.redhat.com/show_bug.cgi?id=2024639, https://www.openwall.com/lists/oss-security/2022/01/10/2, https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1, https://access.redhat.com/security/cve/CVE-2021-3997, https://security.gentoo.org/glsa/202305-15.