{
  "id": "CVE-2024-38543",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-06-19T14:15:14.587",
  "lastModified": "2024-08-29T02:24:30.617",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib/test_hmm.c: handle src_pfns and dst_pfns allocation failure\n\nThe kcalloc() in dmirror_device_evict_chunk() will return null if the\nphysical memory has run out.  As a result, if src_pfns or dst_pfns is\ndereferenced, the null pointer dereference bug will happen.\n\nMoreover, the device is going away.  If the kcalloc() fails, the pages\nmapping a chunk could not be evicted.  So add a __GFP_NOFAIL flag in\nkcalloc().\n\nFinally, as there is no need to have physically contiguous memory, Switch\nkcalloc() to kvcalloc() in order to avoid failing allocations."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: lib/test_hmm.c: maneja el error de asignaci\u00f3n de src_pfns y dst_pfns El kcalloc() en dmirror_device_evict_chunk() devolver\u00e1 nulo si la memoria f\u00edsica se ha agotado. Como resultado, si se desreferencia src_pfns o dst_pfns, se producir\u00e1 el error de desreferencia del puntero nulo. Adem\u00e1s, el dispositivo va a desaparecer. Si kcalloc() falla, las p\u00e1ginas que asignan un fragmento no podr\u00e1n ser desalojadas. Entonces agregue una bandera __GFP_NOFAIL en kcalloc(). Finalmente, como no es necesario tener memoria f\u00edsicamente contigua, cambie kcalloc() a kvcalloc() para evitar asignaciones fallidas."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
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  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-476"
        }
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    }
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      "url": "https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64",
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