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CVE-2026-37228

Estado: AnalizadaAlta (7.5)—

FlexRIC v2.0.0 contains a reachable assertion in e2ap_recv_sctp_msg() (src/lib/ep/e2ap_ep.c). The function allocates a fixed 32KB receive buffer and enforces assert(rc < len) on the sctp_recvmsg() return value. A remote unauthenticated attacker can send a single SCTP message with payload >= 32,768 bytes to crash the near-RT RIC, iApp, E2 Agent, or xApp process via SIGABRT. No valid E2AP PDU is required. All four SCTP endpoint types (ports 36421 and 36422) share this vulnerable code path. In Release builds (NDEBUG), the stripped assertion leads to a signed-to-unsigned integer overflow and potential out-of-bounds read.

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.

Ataque remoto sin autenticación (AV:N, PR:N) contra servicio SCTP expuesto; envío de mensaje malformado causa crash (DoS de aplicación) por assertion fallida.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Mosaic5g — Flexric

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-37228",
  "cveTags": [],
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          "role": "CISA Coordinator",
          "options": [
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          "timestamp": "2026-06-02T13:02:40.480543Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
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  "published": "2026-06-01T19:16:33.187",
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      "value": "FlexRIC v2.0.0 contains a reachable assertion in e2ap_recv_sctp_msg() (src/lib/ep/e2ap_ep.c). The function allocates a fixed 32KB receive buffer and enforces assert(rc < len) on the sctp_recvmsg() return value. A remote unauthenticated attacker can send a single SCTP message with payload >= 32,768 bytes to crash the near-RT RIC, iApp, E2 Agent, or xApp process via SIGABRT. No valid E2AP PDU is required. All four SCTP endpoint types (ports 36421 and 36422) share this vulnerable code path. In Release builds (NDEBUG), the stripped assertion leads to a signed-to-unsigned integer overflow and potential out-of-bounds read."
    },
    {
      "lang": "es",
      "value": "FlexRIC v2.0.0 contiene una aserción alcanzable en e2ap_recv_sctp_msg() (src/lib/ep/e2ap_ep.c). La función asigna un búfer de recepción fijo de 32 KB y aplica assert(rc < len) en el valor de retorno de sctp_recvmsg(). Un atacante remoto no autenticado puede enviar un único mensaje SCTP con una carga útil >= 32.768 bytes para bloquear el proceso near-RT RIC, iApp, E2 Agent o xApp a través de SIGABRT. No se requiere una PDU E2AP válida. Los cuatro tipos de puntos finales SCTP (puertos 36421 y 36422) comparten esta ruta de código vulnerable. En las compilaciones de lanzamiento (NDEBUG), la aserción eliminada conduce a un desbordamiento de entero con signo a sin signo y a una posible lectura fuera de límites."
    }
  ],
  "lastModified": "2026-07-22T07:10:00.107",
  "configurations": [
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  "sourceIdentifier": "cve@mitre.org"
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