Open-iscsi: open-iscsi: ipv6 neighbor discovery missing option length validation in iscsiuio allows arp table poisoning

{
  "id": "339980252657bf711bb232d2f1e3edc6f459297cf04498afc9450a7c720f9f49",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-115486",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Open-iscsi: open-iscsi: ipv6 neighbor discovery missing option length validation in iscsiuio allows arp table poisoning",
    "summary": "A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.",
    "evidence": "cve:CVE-2026-115486",
    "products": [
      {
        "name": {
          "value": "Red Hat Enterprise Linux 10",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Red Hat Enterprise Linux 6",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Red Hat Enterprise Linux 7",
          "evidence": "/containers/cna/affected/2/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Red Hat Enterprise Linux 8",
          "evidence": "/containers/cna/affected/3/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Red Hat Enterprise Linux 9",
          "evidence": "/containers/cna/affected/4/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-115486",
      "aliases": [
        "CVE-2026-115486"
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      "metrics": [
        {
          "other": {
            "type": "Red Hat severity rating",
            "content": {
              "value": "Moderate",
              "namespace": "https://access.redhat.com/security/updates/classification/"
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        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 7.1,
            "attackVector": "ADJACENT_NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
            "integrityImpact": "HIGH",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "LOW",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "NONE"
          }
        }
      ],
      "affected": [
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 10",
          "packageName": "iscsi-initiator-utils",
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          "defaultStatus": "affected"
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          "cpes": [
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          "defaultStatus": "unaffected"
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          "cpes": [
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          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 7",
          "packageName": "iscsi-initiator-utils",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
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          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 8",
          "packageName": "iscsi-initiator-utils",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
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          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 9",
          "packageName": "iscsi-initiator-utils",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "affected"
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      ],
      "modified": "2026-10-26T14:30:55.948Z",
      "provider": "cve",
      "references": [
        "https://access.redhat.com/security/cve/CVE-2026-115486",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2556267"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
          "shortName": "redhat",
          "dateUpdated": "2026-10-26T14:30:55.948Z"
        }
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    },
    "related_cves": [
      {
        "value": "CVE-2026-115486",
        "evidence": "/cveMetadata/cveId"
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    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 311567,
  "published_at": "2026-10-23T00:16:34.25+00:00"
}