{"id":"DEBIAN-CVE-2026-18728","details":"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.","modified":"2026-09-14T17:02:50.292199888Z","published":"2026-08-13T04:17:19.340Z","upstream":["CVE-2026-18728"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-18728"}],"affected":[{"package":{"name":"open-iscsi","ecosystem":"Debian:12","purl":"pkg:deb/debian/open-iscsi?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.10-1","2.1.10-2","2.1.10-3","2.1.11-1","2.1.11-2","2.1.11-3","2.1.11-4","2.1.11-5","2.1.11-6","2.1.12-1","2.1.12-2","2.1.13-1","2.1.8-1","2.1.8-2","2.1.9-1","2.1.9-2","2.1.9-3","2.1.9-4"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18728.json"}},{"package":{"name":"open-iscsi","ecosystem":"Debian:13","purl":"pkg:deb/debian/open-iscsi?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.11-1","2.1.11-1+deb13u1","2.1.11-1+deb13u2","2.1.11-2","2.1.11-3","2.1.11-4","2.1.11-5","2.1.11-6","2.1.12-1","2.1.12-2","2.1.13-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18728.json"}},{"package":{"name":"open-iscsi","ecosystem":"Debian:14","purl":"pkg:deb/debian/open-iscsi?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.13-1"}]}],"versions":["2.1.11-1","2.1.11-2","2.1.11-3","2.1.11-4","2.1.11-5","2.1.11-6","2.1.12-1","2.1.12-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18728.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}