A flaw was found in open-iscsi. An integer underflow vulnerability in the "iscsiuio" component, specifically during IPv4 Dynamic Host Configuration Protocol (DHCP) parsing, allows a remote attacker on the same local network segment to cause a denial of service. By sending a specially crafted IPv4/UDP DHCP reply, the attacker can trigger an out-of-bounds read, leading to the "iscsiuio" process crashing. This issue affects systems where "iscsiuio" is actively handling IPv4 DHCP traffic.