fkie_cve-2021-47360
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2025-05-12 19:54
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: binder: make sure fd closes complete During BC_FREE_BUFFER processing, the BINDER_TYPE_FDA object cleanup may close 1 or more fds. The close operations are completed using the task work mechanism -- which means the thread needs to return to userspace or the file object may never be dereferenced -- which can lead to hung processes. Force the binder thread back to userspace if an fd is closed during BC_FREE_BUFFER handling.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5fdb55c1ac9585eb23bb2541d5819224429e103dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aa2c274c279ff365a06a4cba263f04965895166ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b95483d8d94b41fa31a84c1d86710b7907a37621Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5b0473707fa53b03a5db0256ce62b2874bddbc7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5fdb55c1ac9585eb23bb2541d5819224429e103dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/aa2c274c279ff365a06a4cba263f04965895166ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b95483d8d94b41fa31a84c1d86710b7907a37621Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d5b0473707fa53b03a5db0256ce62b2874bddbc7Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 4.20.1
linux linux_kernel 5.15
linux linux_kernel 5.15


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: make sure fd closes complete\n\nDuring BC_FREE_BUFFER processing, the BINDER_TYPE_FDA object\ncleanup may close 1 or more fds. The close operations are\ncompleted using the task work mechanism -- which means the thread\nneeds to return to userspace or the file object may never be\ndereferenced -- which can lead to hung processes.\n\nForce the binder thread back to userspace if an fd is closed during\nBC_FREE_BUFFER handling."
    },
    {
      "lang": "es",
      "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: carpeta: aseg\u00farese de que fd se cierre por completo Durante el procesamiento BC_FREE_BUFFER, la limpieza del objeto BINDER_TYPE_FDA puede cerrar 1 o m\u00e1s fds. Las operaciones de cierre se completan utilizando el mecanismo de trabajo de tareas, lo que significa que el hilo debe regresar al espacio de usuario o es posible que nunca se elimine la referencia al objeto de archivo, lo que puede llevar a procesos bloqueados. Fuerce el hilo de la carpeta a regresar al espacio de usuario si se cierra un fd durante el manejo de BC_FREE_BUFFER."
    }
  ],
  "id": "CVE-2021-47360",
  "lastModified": "2025-05-12T19:54:35.167",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-05-21T15:15:22.210",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-252"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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