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Vulnerabilities CVE-2026-18728

CVE-2026-18728

Medium
Open
TLP:CLEAR

Open-iscsi: open-iscsi: integer underflow in iscsiuio ipv4 dhcp parsing

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Description

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.

Details

CVSS Score
6.5
CVSS Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Aug 13, 2026
Last Modified
Aug 13, 2026
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