Provide references for CVE-2021-4001.
Where can I find more information about CVE-2021-4001?
References are available at: https://bugzilla.redhat.com/show_bug.cgi?id=2025645, https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=353050be4c19e102178ccc05988101887c25ae53.