CVE-2024-56699

Estado: AnalizadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

s390/pci: Fix potential double remove of hotplug slot

In commit 6ee600bfbe0f ("s390/pci: remove hotplug slot when releasing the device") the zpci_exit_slot() was moved from zpci_device_reserved() to zpci_release_device() with the intention of keeping the hotplug slot around until the device is actually removed.

Now zpci_release_device() is only called once all references are dropped. Since the zPCI subsystem only drops its reference once the device is in the reserved state it follows that zpci_release_device() must only deal with devices in the reserved state. Despite that it contains code to tear down from both configured and standby state. For the standby case this already includes the removal of the hotplug slot so would cause a double removal if a device was ever removed in either configured or standby state.

Leer descripción completaMostrar menos

Instead of causing a potential double removal in a case that should never happen explicitly WARN_ON() if a device in non-reserved state is released and get rid of the dead code cases.

CVSS

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

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.21%
Percentil entre todas las CVEs puntuadas: 11
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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation75 %
Impacto principalT1059 Command and Scripting Interpreterexecution60 %

Vulnerabilidad CWE-415 (double free) en kernel Linux con acceso local (AV:L) y privilegios bajos (PR:L) permite escalada; la liberación doble de memoria puede llevar a ejecución de código arbitrario.

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

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-415

Referencias

JSON original (NVD)

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  "id": "CVE-2024-56699",
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  "published": "2024-12-28T10:15:17.060",
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          "value": "CWE-415"
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/pci: Fix potential double remove of hotplug slot\n\nIn commit 6ee600bfbe0f (\"s390/pci: remove hotplug slot when releasing the\ndevice\") the zpci_exit_slot() was moved from zpci_device_reserved() to\nzpci_release_device() with the intention of keeping the hotplug slot\naround until the device is actually removed.\n\nNow zpci_release_device() is only called once all references are\ndropped. Since the zPCI subsystem only drops its reference once the\ndevice is in the reserved state it follows that zpci_release_device()\nmust only deal with devices in the reserved state. Despite that it\ncontains code to tear down from both configured and standby state. For\nthe standby case this already includes the removal of the hotplug slot\nso would cause a double removal if a device was ever removed in\neither configured or standby state.\n\nInstead of causing a potential double removal in a case that should\nnever happen explicitly WARN_ON() if a device in non-reserved state is\nreleased and get rid of the dead code cases."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: s390/pci: Arreglar posible doble eliminación de ranura hotplug En el commit 6ee600bfbe0f (\"s390/pci: eliminar ranura hotplug al liberar el dispositivo\"), zpci_exit_slot() se movió de zpci_device_reserved() a zpci_release_device() con la intención de mantener la ranura hotplug hasta que el dispositivo sea realmente eliminado. Ahora, zpci_release_device() solo se llama una vez que se eliminan todas las referencias. Dado que el subsistema zPCI solo elimina su referencia una vez que el dispositivo está en el estado reservado, se deduce que zpci_release_device() solo debe tratar con dispositivos en el estado reservado. A pesar de eso, contiene código para desmantelar tanto el estado configurado como el de espera. Para el caso de espera, esto ya incluye la eliminación de la ranura hotplug, por lo que causaría una doble eliminación si un dispositivo alguna vez se eliminara en estado configurado o de espera. En lugar de provocar una posible doble eliminación en un caso que nunca debería ocurrir, use WARN_ON() explícitamente si se libera un dispositivo en estado no reservado y elimine los casos de código inactivo."
    }
  ],
  "lastModified": "2026-06-17T08:12:46.543",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}