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CVE-2025-26618

Estado: AplazadaAlta (7)—

Erlang is a programming language and runtime system for building massively scalable soft real-time systems with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size and potentially cause large amount of memory to be allocated.

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Note that situation described above can only happen for successfully authenticated users after completing the SSH handshake. This issue has been patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this vulnerability.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:L post-autenticación indica explotación de servicio remoto (SSH/SFTP). El ataque causa asignación excesiva de memoria (CWE-789), resultando en DoS de recursos.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationFilter Network TrafficDisable or Remove Feature or Program

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Erlang — OTPAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-26618",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-26618",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-02-20T20:55:12.631567Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 7,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "erlang",
          "product": "otp",
          "versions": [
            {
              "status": "affected",
              "version": ">= OTP-27.0.0, < OTP-27.2.4"
            },
            {
              "status": "affected",
              "version": ">= OTP-26.0.0.0, < OTP-26.2.5.9"
            },
            {
              "status": "affected",
              "version": "< OTP-25.3.2.18"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-02-20T19:15:11.953",
  "references": [
    {
      "url": "https://github.com/erlang/otp/commit/0ed2573cbd55c92e9125c9dc70fa1ca7fed82872",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/erlang/otp/security/advisories/GHSA-78cv-45vx-q6fr",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/04/msg00028.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://erlang.org/download/OTP-27.2.4.README.md",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Erlang is a programming language and runtime system for building massively scalable soft real-time systems with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size and potentially cause large amount of memory to be allocated. Note that situation described above can only happen for successfully authenticated users after completing the SSH handshake. This issue has been patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this vulnerability."
    },
    {
      "lang": "es",
      "value": "Erlang es un lenguaje de programación y un sistema de ejecución para crear sistemas de tiempo real flexibles y escalables de forma masiva con requisitos de alta disponibilidad. OTP es un conjunto de bibliotecas de Erlang, que consta del sistema de ejecución de Erlang, una serie de componentes listos para usar escritos principalmente en Erlang. El tamaño de los paquetes no se verifica correctamente para los paquetes SFTP. Como resultado, cuando se reciben varios paquetes SSH (que se ajustan al tamaño máximo de paquete SSH) por ssh, es posible que se combinen en un paquete SFTP que superará el tamaño máximo de paquete permitido y potencialmente provocará que se asigne una gran cantidad de memoria. Tenga en cuenta que la situación descrita anteriormente solo puede ocurrir para usuarios autenticados correctamente después de completar el protocolo de enlace SSH. Este problema se ha corregido en las versiones 27.2.4, 26.2.5.9 y 25.3.2.18 de OTP. No se conocen workarounds para esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T09:02:08.413",
  "sourceIdentifier": "security-advisories@github.com"
}