CVE-2026-59691

Estado: Pendiente de análisisAlta (7.1)—

A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.60%
Percentil entre todas las CVEs puntuadas: 47
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1203 Exploitation for Client Executionexecution85 %
Impacto principalT1499.004 Application or System Exploitationimpact75 %
Impacto secundarioT1565.001 Stored Data Manipulationimpact60 %

Vector CVSS con UI:R indica interacción del usuario (conectar a servidor RFB/VNC malicioso). Heap buffer overflow causa DoS (crash de proceso) e corrupción de memoria. CWE-787 sustenta escritura fuera de límites.

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

Restrict File and Directory Permissions Remote Data Storage Filter Network Traffic Encrypt Sensitive Information Application Isolation and Sandboxing Exploit Protection

Tecnologías afectadas (1)

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

Gstreamer — Gstreamer^AI

CWE

CWE-787

Referencias

JSON original (NVD)

Mostrar

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      "url": "https://access.redhat.com/errata/RHSA-2026:47179",
      "source": "secalert@redhat.com"
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      "url": "https://access.redhat.com/errata/RHSA-2026:47180",
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    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-59691",
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    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497343",
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    {
      "url": "https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/100",
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  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
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  "descriptions": [
    {
      "lang": "en",
      "value": "A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption."
    }
  ],
  "lastModified": "2026-09-02T09:16:39.297",
  "sourceIdentifier": "secalert@redhat.com"
}