CVE-2026-41135

{
  "id": "CVE-2026-41135",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-22T00:16:29.287",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "free5GC UDR is the Policy Control Function (PCF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. A memory leak vulnerability in versions prior to 1.4.3 allows any unauthenticated attacker with network access to the PCF SBI interface to cause uncontrolled memory growth by sending repeated HTTP requests to the OAM endpoint. The root cause is a `router.Use()` call inside an HTTP handler that registers a new CORS middleware on every incoming request, permanently growing the Gin router's handler chain. This leads to progressive memory exhaustion and eventual Denial of Service of the PCF, preventing all UEs from obtaining AM and SM policies and blocking 5G session establishment. Version 1.4.3 contains a patch."
    },
    {
      "lang": "es",
      "value": "free5GC UDR es la Función de Control de Políticas (PCF) para free5GC, un proyecto de código abierto para redes centrales móviles de 5ª generación (5G). Una vulnerabilidad de fuga de memoria en versiones anteriores a la 1.4.3 permite a cualquier atacante no autenticado con acceso de red a la interfaz SBI del PCF causar un crecimiento descontrolado de la memoria enviando repetidas solicitudes HTTP al punto final OAM. La causa raíz es una llamada a ’router.Use()’ dentro de un gestor HTTP que registra un nuevo middleware CORS en cada solicitud entrante, haciendo crecer permanentemente la cadena de gestores del router Gin. Esto conduce al agotamiento progresivo de la memoria y a una eventual denegación de servicio del PCF, impidiendo que todos los UE obtengan políticas AM y SM y bloqueando el establecimiento de sesiones 5G. La versión 1.4.3 contiene un parche."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "free5gc",
          "product": "pcf",
          "versions": [
            {
              "version": "< 1.4.3",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
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    "cvssMetricV31": [
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        "source": "[email protected]",
        "type": "Secondary",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
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        "ssvcData": {
          "timestamp": "2026-04-22T14:19:35.605073Z",
          "id": "CVE-2026-41135",
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  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
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  "references": [
    {
      "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-98cp-84m9-q3qp",
      "source": "[email protected]",
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      "url": "https://github.com/free5gc/pcf/commit/599803b1b2eb4611e26d5216481ee142bce71a16",
      "source": "[email protected]",
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