fkie_cve-2025-37952
Vulnerability from fkie_nvd
Published
2025-05-20 16:15
Modified
2025-11-17 12:57
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix UAF in __close_file_table_ids A use-after-free is possible if one thread destroys the file via __ksmbd_close_fd while another thread holds a reference to it. The existing checks on fp->refcount are not sufficient to prevent this. The fix takes ft->lock around the section which removes the file from the file table. This prevents two threads acquiring the same file pointer via __close_file_table_ids, as well as the other functions which retrieve a file from the IDR and which already use this same lock.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16727e442568a46d9cca69fe2595896de86e120dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/36991c1ccde2d5a521577c448ffe07fcccfe104dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e9841e232b51171ddf3bc4ee517d5d28dc8cad6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fec1f9e9a650e8e7011330a085c77e7bf2a08ea9Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15


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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix UAF in __close_file_table_ids\n\nA use-after-free is possible if one thread destroys the file\nvia __ksmbd_close_fd while another thread holds a reference to\nit. The existing checks on fp-\u003erefcount are not sufficient to\nprevent this.\n\nThe fix takes ft-\u003elock around the section which removes the\nfile from the file table. This prevents two threads acquiring the\nsame file pointer via __close_file_table_ids, as well as the other\nfunctions which retrieve a file from the IDR and which already use\nthis same lock."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: Correcci\u00f3n de UAF en __close_file_table_ids. Es posible un use-after-free si un hilo destruye el archivo mediante __ksmbd_close_fd mientras otro hilo mantiene una referencia a \u00e9l. Las comprobaciones existentes en fp-\u0026gt;refcount no son suficientes para evitarlo. La correcci\u00f3n aplica ft-\u0026gt;lock a la secci\u00f3n que elimina el archivo de la tabla de archivos. Esto impide que dos hilos adquieran el mismo puntero de archivo mediante __close_file_table_ids, as\u00ed como otras funciones que recuperan un archivo del IDR y que ya utilizan este mismo bloqueo."
    }
  ],
  "id": "CVE-2025-37952",
  "lastModified": "2025-11-17T12:57:06.880",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-05-20T16:15:33.353",
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  "vulnStatus": "Analyzed",
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          "lang": "en",
          "value": "CWE-416"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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