CVE-2007-4571

Estado: ModificadaBaja (2.1)—Exploit

Gravedad2.1Baja · CVSS 2.0

Probabilidad de explotación0.76 %mayor que el 55 % de las CVE

Explotación activaNono figura en el catálogo de CISA

Exploit públicoDisponiblePublicado en Exploit-DB

La función snd_mem_proc_read en sound/core/memalloc.c de Advanced Linux Sound Architecture (ALSA) en el núcleo de Linux anterior a 2.6.22.8 no devuelve el tamaño de escritura correcto, lo cual permite a usuarios locales obtener información sensible (contenidos de la memoria del núcleo) mediante un argumento de cuenta pequeño, como ha sido demostrado mediante múltiples lecturas de /proc/driver/snd-page-alloc.

CVSS

Puntuación base: 2.1
Versión: 2.0
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.76 %
Percentil entre todas las CVEs puntuadas: 55
Fecha de la puntuación: 21/10/2026

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).

Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

Publicado en Exploit-DB · Linux Kernel 2.6.x - ALSA snd-page-alloc Local Proc File Information Disclosure (21/9/2007)

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-Other

Referencias

Mostrar las 58 referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2007-4571",
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        "source": "nvd@nist.gov",
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          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "versions": [
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  "published": "2007-09-26T10:17:00.000",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
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      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
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  "descriptions": [
    {
      "lang": "en",
      "value": "The snd_mem_proc_read function in sound/core/memalloc.c in the Advanced Linux Sound Architecture (ALSA) in the Linux kernel before 2.6.22.8 does not return the correct write size, which allows local users to obtain sensitive information (kernel memory contents) via a small count argument, as demonstrated by multiple reads of /proc/driver/snd-page-alloc."
    },
    {
      "lang": "es",
      "value": "La función snd_mem_proc_read en sound/core/memalloc.c de Advanced Linux Sound Architecture (ALSA) en el núcleo de Linux anterior a 2.6.22.8 no devuelve el tamaño de escritura correcto, lo cual permite a usuarios locales obtener información sensible (contenidos de la memoria del núcleo) mediante un argumento de cuenta pequeño, como ha sido demostrado mediante múltiples lecturas de /proc/driver/snd-page-alloc."
    }
  ],
  "lastModified": "2026-06-16T22:44:21.123",
  "configurations": [
    {
      "nodes": [
        {
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          "cpeMatch": [
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              "versionEndIncluding": "2.6.22.7"
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          "operator": "OR"
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  "vendorComments": [
    {
      "comment": "This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 2.1 or 3.",
      "lastModified": "2007-10-18T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}