edk2 is vulnerable to denial of service (DoS). It is due to stack overflow in XHCI causing denial of service.
lists.opensuse.org/opensuse-security-announce/2019-05/msg00019.html
lists.opensuse.org/opensuse-security-announce/2019-05/msg00046.html
access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.7_release_notes/index
access.redhat.com/errata/RHSA-2019:2125
access.redhat.com/errata/RHSA-2019:2437
access.redhat.com/security/updates/classification/#moderate
edk2-docs.gitbooks.io/security-advisory/content/xhci-stack-local-stack-overflow.html
lists.debian.org/debian-lts-announce/2021/04/msg00032.html
lists.fedoraproject.org/archives/list/[email protected]/message/TQYVZRFEXSN3KS43AVH4D7QX553EZQYP/