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CVE-2023-52617

Estado: AnalizadaMedia (4.4)—

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: switchtec: corrige el bloqueo de stdev_release() después de una eliminación sorpresa en caliente. Puede ocurrir una eliminación en caliente del dispositivo PCI mientras stdev->cdev se mantiene abierto. La llamada a stdev_release() ocurre durante el cierre o la salida, en un punto mucho más allá de switchtec_pci_remove(). De lo contrario, la última referencia desaparecería con el put_device() final, justo antes del retorno. En ese momento posterior, la limpieza devm ya eliminó la asignación stdev->mmio_mrpc.

Leer descripción completaMostrar menos

Además, la referencia stdev->pdev no se contaba. Por lo tanto, en modo DMA, iowrite32() en stdev_release() causará un error de página fatal, y el dma_free_coherent() posterior, si se alcanza, pasaría un puntero &stdev->pdev->dev obsoleto. Para solucionarlo, mueva el apagado de MRPC DMA a switchtec_pci_remove(), después de stdev_kill(). Contar stdev->pdev ref ahora es opcional, pero puede evitar accidentes futuros. Reproducible a través del script en https://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com

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).

Tecnologías afectadas (2)

Debian — Debian LinuxLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2023-52617",
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-04-10T20:25:20.462363Z"
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-459"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: switchtec: Fix stdev_release() crash after surprise hot remove\n\nA PCI device hot removal may occur while stdev->cdev is held open. The call\nto stdev_release() then happens during close or exit, at a point way past\nswitchtec_pci_remove(). Otherwise the last ref would vanish with the\ntrailing put_device(), just before return.\n\nAt that later point in time, the devm cleanup has already removed the\nstdev->mmio_mrpc mapping. Also, the stdev->pdev reference was not a counted\none. Therefore, in DMA mode, the iowrite32() in stdev_release() will cause\na fatal page fault, and the subsequent dma_free_coherent(), if reached,\nwould pass a stale &stdev->pdev->dev pointer.\n\nFix by moving MRPC DMA shutdown into switchtec_pci_remove(), after\nstdev_kill(). Counting the stdev->pdev ref is now optional, but may prevent\nfuture accidents.\n\nReproducible via the script at\nhttps://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: switchtec: corrige el bloqueo de stdev_release() después de una eliminación sorpresa en caliente. Puede ocurrir una eliminación en caliente del dispositivo PCI mientras stdev->cdev se mantiene abierto. La llamada a stdev_release() ocurre durante el cierre o la salida, en un punto mucho más allá de switchtec_pci_remove(). De lo contrario, la última referencia desaparecería con el put_device() final, justo antes del retorno. En ese momento posterior, la limpieza devm ya eliminó la asignación stdev->mmio_mrpc. Además, la referencia stdev->pdev no se contaba. Por lo tanto, en modo DMA, iowrite32() en stdev_release() causará un error de página fatal, y el dma_free_coherent() posterior, si se alcanza, pasaría un puntero &stdev->pdev->dev obsoleto. Para solucionarlo, mueva el apagado de MRPC DMA a switchtec_pci_remove(), después de stdev_kill(). Contar stdev->pdev ref ahora es opcional, pero puede evitar accidentes futuros. Reproducible a través del script en https://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com"
    }
  ],
  "lastModified": "2026-06-17T06:43:10.370",
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