fkie_cve-2024-56709
Vulnerability from fkie_nvd
Published
2024-12-29 09:15
Modified
2025-10-15 17:42
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: io_uring: check if iowq is killed before queuing task work can be executed after the task has gone through io_uring termination, whether it's the final task_work run or the fallback path. In this case, task work will find ->io_wq being already killed and null'ed, which is a problem if it then tries to forward the request to io_queue_iowq(). Make io_queue_iowq() fail requests in this case. Note that it also checks PF_KTHREAD, because the user can first close a DEFER_TASKRUN ring and shortly after kill the task, in which case ->iowq check would race.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2ca94c8de36091067b9ce7527ae8db3812d38781Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f95a2186b7f2af09331e1e8069bcaf34fe019cfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/534d59ab38010aada88390db65985e65d0de7d9ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbd2ca9367eb19bc5e269b8c58b0b1514ada9156Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.14
linux linux_kernel 5.14
linux linux_kernel 5.14
linux linux_kernel 5.14
linux linux_kernel 5.14
linux linux_kernel 6.13
linux linux_kernel 6.13
linux linux_kernel 6.13


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: check if iowq is killed before queuing\n\ntask work can be executed after the task has gone through io_uring\ntermination, whether it\u0027s the final task_work run or the fallback path.\nIn this case, task work will find -\u003eio_wq being already killed and\nnull\u0027ed, which is a problem if it then tries to forward the request to\nio_queue_iowq(). Make io_queue_iowq() fail requests in this case.\n\nNote that it also checks PF_KTHREAD, because the user can first close\na DEFER_TASKRUN ring and shortly after kill the task, in which case\n-\u003eiowq check would race."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring: comprueba si iowq se elimina antes de que se pueda ejecutar la tarea de cola work despu\u00e9s de que la tarea haya pasado por la terminaci\u00f3n io_uring, ya sea la ejecuci\u00f3n final de task_work o la ruta de respaldo. En este caso, la tarea work encontrar\u00e1 que -\u0026gt;io_wq ya se ha eliminado y se ha anulado, lo que es un problema si luego intenta reenviar la solicitud a io_queue_iowq(). Haz que io_queue_iowq() falle las solicitudes en este caso. Ten en cuenta que tambi\u00e9n comprueba PF_KTHREAD, porque el usuario puede cerrar primero un anillo DEFER_TASKRUN y poco despu\u00e9s eliminar la tarea, en cuyo caso la comprobaci\u00f3n de -\u0026gt;iowq se acelerar\u00eda."
    }
  ],
  "id": "CVE-2024-56709",
  "lastModified": "2025-10-15T17:42:44.090",
  "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"
      }
    ]
  },
  "published": "2024-12-29T09:15:05.820",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/2ca94c8de36091067b9ce7527ae8db3812d38781"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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