fkie_cve-2024-38543
Vulnerability from fkie_nvd
Published
2024-06-19 14:15
Modified
2024-11-21 09:26
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: lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure The kcalloc() in dmirror_device_evict_chunk() will return null if the physical memory has run out. As a result, if src_pfns or dst_pfns is dereferenced, the null pointer dereference bug will happen. Moreover, the device is going away. If the kcalloc() fails, the pages mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in kcalloc(). Finally, as there is no need to have physically contiguous memory, Switch kcalloc() to kvcalloc() in order to avoid failing allocations.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bcPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
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      "nodes": [
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  "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."
    }
  ],
  "id": "CVE-2024-38543",
  "lastModified": "2024-11-21T09:26:18.130",
  "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "published": "2024-06-19T14:15:14.587",
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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