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CVE-2026-5072

Estado: AnalizadaMedia (6.5)—

A bitwise shift vulnerability in Zephyr's PTP subsystem allows a remote attacker to cause undefined behavior and potential system crashes. An attacker sends a crafted PTP_MSG_MANAGEMENT message to set an unvalidated negative log_announce_interval value in the port's data set. When a subsequent PTP_MSG_ANNOUNCE message is processed, port_timer_set_timeout_random computes a timeout as NSEC_PER_SEC >> -log_seconds; if the attacker-supplied value is sufficiently negative (e.g., -127), the shift amount exceeds the 64-bit integer width, triggering undefined behavior in C. This can cause a system crash via a compiler-generated illegal instruction trap on some architectures, or produce an erroneous zero timeout leading to resource starvation loops or other logical errors.

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).

Tecnologías afectadas (1)

Zephyrproject — Zephyr

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-5072",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-5072",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-22T16:27:18.853870Z"
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    "cvssMetricV31": [
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
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  "affected": [
    {
      "source": "vulnerabilities@zephyrproject.org",
      "affectedData": [
        {
          "repo": "https://github.com/zephyrproject-rtos/zephyr",
          "vendor": "zephyrproject-rtos",
          "product": "Zephyr",
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  "published": "2026-05-22T08:16:15.027",
  "references": [
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      "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3v98-458v-388r",
      "tags": [
        "Exploit",
        "Patch",
        "Vendor Advisory"
      ],
      "source": "vulnerabilities@zephyrproject.org"
    }
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
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          "lang": "en",
          "value": "CWE-1335"
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  "descriptions": [
    {
      "lang": "en",
      "value": "A bitwise shift vulnerability in Zephyr's PTP subsystem allows a remote attacker to cause undefined behavior and potential system crashes. An attacker sends a crafted PTP_MSG_MANAGEMENT message to set an unvalidated negative log_announce_interval value in the port's data set. When a subsequent PTP_MSG_ANNOUNCE message is processed, port_timer_set_timeout_random computes a timeout as NSEC_PER_SEC >> -log_seconds; if the attacker-supplied value is sufficiently negative (e.g., -127), the shift amount exceeds the 64-bit integer width, triggering undefined behavior in C. This can cause a system crash via a compiler-generated illegal instruction trap on some architectures, or produce an erroneous zero timeout leading to resource starvation loops or other logical errors."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desplazamiento de bits en el subsistema PTP de Zephyr permite a un atacante remoto causar comportamiento indefinido y posibles fallos del sistema. Un atacante envía un mensaje PTP_MSG_MANAGEMENT manipulado para establecer un valor negativo no validado de log_announce_interval en el conjunto de datos del puerto. Cuando se procesa un mensaje PTP_MSG_ANNOUNCE subsiguiente, port_timer_set_timeout_random calcula un tiempo de espera como NSEC_PER_SEC >> -log_seconds; si el valor proporcionado por el atacante es suficientemente negativo (p. ej., -127), la cantidad de desplazamiento excede el ancho de entero de 64 bits, lo que desencadena un comportamiento indefinido en C. Esto puede causar un fallo del sistema a través de una trampa de instrucción ilegal generada por el compilador en algunas arquitecturas, o producir un tiempo de espera cero erróneo lo que lleva a bucles de inanición de recursos u otros errores lógicos."
    }
  ],
  "lastModified": "2026-07-23T16:10:00.137",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndIncluding": "4.3.0"
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          "operator": "OR"
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  ],
  "sourceIdentifier": "vulnerabilities@zephyrproject.org"
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