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CVE-2026-88839

Estado: Pendiente de análisisMedia (6.7)—

BusyBox passwd/group tokenize() references a stale endpoint pointer after trimming, causing an out-of-bounds write of heap pointers.

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.

Vulnerabilidad de escritura fuera de límites (CWE-787) en BusyBox con acceso local privilegiado (AV:L/PR:H). Permite escalada local y ejecución de código mediante corrupción de heap. El impacto en passwd/group sugiere también manipulación de credenciales de cuenta.

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

Privileged Account ManagementExecution PreventionApplication Developer GuidanceActive Directory ConfigurationUser TrainingUser Account Management

Tecnologías afectadas (1)

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

Busybox — BusyboxAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-88839",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-88839",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-09-23T19:19:09.117423Z"
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.7,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 0.8
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  "affected": [
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      "affectedData": [
        {
          "cpes": [
            "cpe:/a:redhat:hummingbird:1"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Hardened Images",
          "versions": [
            {
              "status": "unaffected",
              "version": "1.37.0-9.1.hum1",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "busybox-main",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
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  "published": "2026-09-23T18:17:10.640",
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:72111",
      "source": "secalert@redhat.com"
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    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-88839",
      "source": "secalert@redhat.com"
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    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531353",
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  "vulnStatus": "Awaiting Analysis",
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    {
      "lang": "en",
      "value": "BusyBox passwd/group tokenize() references a stale endpoint pointer after trimming, causing an out-of-bounds write of heap pointers."
    }
  ],
  "lastModified": "2026-09-25T23:16:54.907",
  "sourceIdentifier": "secalert@redhat.com"
}