{
  "cveId": "CVE-2026-18728",
  "url": "https://patchblox.com/security/cve/CVE-2026-18728",
  "summary": "CVE-2026-18728 is fixed in 9 products on 1 platform, first by DEBIAN-CVE-2026-18728, released August 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Open-iscsi: open-iscsi: integer underflow in iscsiuio ipv4 dhcp parsing",
  "description": "A flaw was found in open-iscsi. An integer underflow vulnerability in the \u0060iscsiuio\u0060 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 \u0060iscsiuio\u0060 process crashing. This issue affects systems where \u0060iscsiuio\u0060 is actively handling IPv4 DHCP traffic.",
  "published": "2026-08-13T04:17:19Z",
  "severity": "Moderate",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Integer Underflow (Wrap or Wraparound)",
  "epss": 0.00312,
  "epssPercentile": 0.24314,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-18728",
  "fixes": [
    {
      "platform": "linux",
      "product": "iscsi-initiator-utils",
      "release": "amzn 2023",
      "fixedVersion": "6.2.1.4-10.git2a8f9d8.amzn2023.0.4",
      "fix": "ALAS2023-2026-2120",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2120",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iscsi-initiator-utils-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.2.1.4-10.git2a8f9d8.amzn2023.0.4",
      "fix": "ALAS2023-2026-2120",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2120",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iscsi-initiator-utils-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "6.2.1.4-10.git2a8f9d8.amzn2023.0.4",
      "fix": "ALAS2023-2026-2120",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2120",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iscsi-initiator-utils-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.2.1.4-10.git2a8f9d8.amzn2023.0.4",
      "fix": "ALAS2023-2026-2120",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2120",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iscsi-initiator-utils-iscsiuio",
      "release": "amzn 2023",
      "fixedVersion": "6.2.1.4-10.git2a8f9d8.amzn2023.0.4",
      "fix": "ALAS2023-2026-2120",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2120",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iscsi-initiator-utils-iscsiuio-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.2.1.4-10.git2a8f9d8.amzn2023.0.4",
      "fix": "ALAS2023-2026-2120",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2120",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "open-iscsi",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.1.8-1\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2026-18728",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-18728",
      "released": "2026-08-13T04:17:19Z"
    },
    {
      "platform": "linux",
      "product": "open-iscsi",
      "release": "Debian 14",
      "fixedVersion": "2.1.13-1",
      "fix": "DEBIAN-CVE-2026-18728",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-18728",
      "released": "2026-08-13T04:17:19Z"
    },
    {
      "platform": "linux",
      "product": "python3-iscsi-initiator-utils",
      "release": "amzn 2023",
      "fixedVersion": "6.2.1.4-10.git2a8f9d8.amzn2023.0.4",
      "fix": "ALAS2023-2026-2120",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2120",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-iscsi-initiator-utils-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.2.1.4-10.git2a8f9d8.amzn2023.0.4",
      "fix": "ALAS2023-2026-2120",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2120",
      "released": "2026-08-31T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}