An issue in upf in open5gs 2.7.2 and earlier allows a remote attacker to cause a Denial of Service via a crafted PFCP SessionEstablishmentRequest packet with restoration indication = true and (teid = 0 or teid >= ogs_pfcp_pdr_teid_pool.size).
https://github.com/open5gs/open5gs/issues/3747
https://gist.github.com/scmdcs/581fa485f957239ea5551daa173d0189