FKIE_CVE-2024-42250

Vulnerability from fkie_nvd - Published: 2024-08-07 16:15 - Updated: 2025-11-03 22:17
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: cachefiles: add missing lock protection when polling Add missing lock protection in poll routine when iterating xarray, otherwise: Even with RCU read lock held, only the slot of the radix tree is ensured to be pinned there, while the data structure (e.g. struct cachefiles_req) stored in the slot has no such guarantee. The poll routine will iterate the radix tree and dereference cachefiles_req accordingly. Thus RCU read lock is not adequate in this case and spinlock is needed here.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6bb6bd3dd6f382dfd36220d4b210a0c77c066651Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8eadcab7f3dd809edbe5ae20533ff843dfea3a07Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97cfd5e20ddc2e33e16ce369626ce76c9a475fd7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf5bb09e742a9cf6349127e868329a8f69b7a014Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: add missing lock protection when polling\n\nAdd missing lock protection in poll routine when iterating xarray,\notherwise:\n\nEven with RCU read lock held, only the slot of the radix tree is\nensured to be pinned there, while the data structure (e.g. struct\ncachefiles_req) stored in the slot has no such guarantee.  The poll\nroutine will iterate the radix tree and dereference cachefiles_req\naccordingly.  Thus RCU read lock is not adequate in this case and\nspinlock is needed here."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: archivos de cach\u00e9: agregue protecci\u00f3n de bloqueo faltante al sondear. Agregue protecci\u00f3n de bloqueo faltante en la rutina de sondeo al iterar xarray; de lo contrario: incluso con el bloqueo de lectura de RCU mantenido, solo se garantiza que la ranura del \u00e1rbol de base ser anclado all\u00ed, mientras que la estructura de datos (por ejemplo, struct cachefiles_req) almacenada en la ranura no tiene tal garant\u00eda. La rutina de sondeo iterar\u00e1 el \u00e1rbol de base y eliminar\u00e1 la referencia a cachefiles_req en consecuencia. Por lo tanto, el bloqueo de lectura de la RCU no es adecuado en este caso y aqu\u00ed se necesita el bloqueo de giro."
    }
  ],
  "id": "CVE-2024-42250",
  "lastModified": "2025-11-03T22:17:50.350",
  "metrics": {
    "cvssMetricV31": [
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        "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": "2024-08-07T16:15:47.567",
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      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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