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CVE-2023-0461

Estado: ModificadaAlta (7.8)—PoC
Gravedad7.8Alta · CVSS 3.1
Probabilidad de explotación0.65 %mayor que el 50 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoDisponiblePrueba de concepto en GitHub (no verificada)

Existe una vulnerabilidad de uso después de liberar (use-after-free) en el kernel de Linux que puede explotarse para conseguir una escalada de privilegios local. Para alcanzar la vulnerabilidad es necesario que esté configurado el indicador del kernel CONFIG_TLS o CONFIG_XFRM_ESPINTCP, pero la operación no requiere ningún privilegio.

Hay un error de uso después de liberar en icsk_ulp_data de una estructura struct inet_connection_sock.

Cuando CONFIG_TLS está habilitado, el usuario puede instalar un contexto TLS (struct tls_context) en un socket TCP conectado. El contexto no se limpia si este socket se desconecta y se reutiliza como oyente (listener). Si se crea un nuevo socket a partir del oyente, el contexto se hereda y es vulnerable.

Leer descripción completaMostrar menos

La operación TCP_ULP de setsockopt no requiere ningún privilegio.

Recomendamos actualizar a una versión posterior al commit 2c02d41d71f90a5168391b6a5f2954112ba2307c

Traducción automática del texto original de NVD (en inglés).

CVSS

Puntuación base
7.8
Versión
3.1
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
0.65 %
Percentil entre todas las CVEs puntuadas
50
Fecha de la puntuación
20/10/2026

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.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

Mostrar las 9 referencias

JSON original (NVD)

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  "references": [
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      "tags": [
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        "Patch"
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      "source": "cve-coordination@google.com"
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    {
      "url": "https://kernel.dance/#2c02d41d71f90a5168391b6a5f2954112ba2307c",
      "tags": [
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      "source": "cve-coordination@google.com"
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      "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html",
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  "vulnStatus": "Modified",
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          "value": "CWE-416"
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    {
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-416"
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    }
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  "descriptions": [
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      "lang": "en",
      "value": "There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not require any privilege.\n\nThere is a use-after-free bug of icsk_ulp_data of a struct inet_connection_sock.\n\nWhen CONFIG_TLS is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.\n\nThe setsockopt TCP_ULP operation does not require any privilege.\n\nWe recommend upgrading past commit 2c02d41d71f90a5168391b6a5f2954112ba2307c"
    }
  ],
  "lastModified": "2026-06-17T05:25:36.220",
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