CVE-2026-58374

{
  "id": "CVE-2026-58374",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-30T13:19:18.960",
  "lastModified": "2026-10-25T21:10:00.770",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) association request processing allows an unauthenticated attacker within wireless range to send a crafted management frame containing a malformed Multi-Link Element or Per-STA Profile subelement. In hostapd_process_ml_assoc_req() in src/ap/ieee802_11_eht.c, the received link_id field can be parsed as value 15, but the corresponding links[] storage only has valid entries for lower link IDs (0 through 14). This causes an out-of-bounds write / small memory corruption during association processing before the 4-way handshake. The attack does not require network credentials, prior authentication, or user interaction. The confirmed practical impact is denial of service through hostapd process termination. This affects hostapd v2.11 and newer development snapshots before v2.12 when built with CONFIG_IEEE80211BE enabled. The issue is fixed in hostapd v2.12 and the upstream 2026-1 fixes."
    },
    {
      "lang": "es",
      "value": "En hostapd anterior a 2.12, una comprobación de límites faltante en el procesamiento de solicitudes de asociación de Operación Multi-Enlace (MLO) de Wi-Fi 7 (IEEE 802.11be) en modo AP permite a un atacante no autenticado dentro del alcance inalámbrico enviar una trama de gestión manipulada que contiene un elemento Multi-Enlace o subelemento de Perfil por STA malformado. En hostapd_process_ml_assoc_req() en src/ap/ieee802_11_eht.c, el campo link_id recibido puede ser analizado como valor 15, pero el almacenamiento links[] correspondiente solo tiene entradas válidas para IDs de enlace inferiores (0 a 14). Esto causa una escritura fuera de límites / pequeña corrupción de memoria durante el procesamiento de asociación antes del handshake de 4 vías. El ataque no requiere credenciales de red, autenticación previa o interacción del usuario. El impacto práctico confirmado es denegación de servicio a través de la terminación del proceso hostapd. Esto afecta a hostapd v2.11 y a las instantáneas de desarrollo más recientes anteriores a v2.12 cuando se compila con CONFIG_IEEE80211BE habilitado. El problema está solucionado en hostapd v2.12 y las correcciones upstream 2026-1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "w1.fi",
          "product": "hostapd",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "2.12",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-30T13:38:17.879838Z",
          "id": "CVE-2026-58374",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-193"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:w1.fi:hostapd:*:*:*:*:*:*:*:*",
              "versionEndIncluding": "2.11",
              "matchCriteriaId": "2634D924-B17C-47D4-B6DE-F69736D79E54"
            }
          ]
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  ],
  "references": [
    {
      "url": "https://git.w1.fi/cgit/hostap/commit/?id=46dd5a4ffc9bcf44cf8fc45120b3e1e5ec922187",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.w1.fi/cgit/hostap/commit/?id=aa9d345887389a251c63a3781d2ad2940d079193",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://w1.fi/security/2026-1/",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking"
      ]
    },
    {
      "url": "https://w1.fi/security/2026-1/missing-ml-parsing-validation.txt",
      "source": "[email protected]",
      "tags": [
        "Mitigation",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.openwall.com/lists/oss-security/2026/06/30/1",
      "source": "[email protected]",
      "tags": [
        "Mailing List",
        "Mitigation",
        "Patch"
      ]
    }
  ]
}