fkie_cve-2022-49762
Vulnerability from fkie_nvd
Published
2025-05-01 15:15
Modified
2025-11-06 21:59
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: ntfs: check overflow when iterating ATTR_RECORDs Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). Because the ATTR_RECORDs are next to each other, kernel can get the next ATTR_RECORD from end address of current ATTR_RECORD, through current ATTR_RECORD length field. The problem is that during iteration, when kernel calculates the end address of current ATTR_RECORD, kernel may trigger an integer overflow bug in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))`. This may wrap, leading to a forever iteration on 32bit systems. This patch solves it by adding some checks on calculating end address of current ATTR_RECORD during iteration.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/45683723f6b53e39e8a4cec0894e61fd6ec71989Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5559eb5809353a83a40a1e4e7f066431c7b83020Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/785b2af9654b8beac55644e36da0085c5d776361Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/957732a09c3828267c2819d31c425aa793dd475bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b612f924f296408d7d02fb4cd01218afd4ed7184Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b63ddb3ba61e2d3539f87e095c881e552bc45dabPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: check overflow when iterating ATTR_RECORDs\n\nKernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). \nBecause the ATTR_RECORDs are next to each other, kernel can get the next\nATTR_RECORD from end address of current ATTR_RECORD, through current\nATTR_RECORD length field.\n\nThe problem is that during iteration, when kernel calculates the end\naddress of current ATTR_RECORD, kernel may trigger an integer overflow bug\nin executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a-\u003elength))`.  This\nmay wrap, leading to a forever iteration on 32bit systems.\n\nThis patch solves it by adding some checks on calculating end address\nof current ATTR_RECORD during iteration."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ntfs: desbordamiento de comprobaci\u00f3n al iterar ATTR_RECORDs El kernel itera sobre los ATTR_RECORD en el registro mft en ntfs_attr_find(). Debido a que los ATTR_RECORD est\u00e1n uno al lado del otro, el kernel puede obtener el siguiente ATTR_RECORD desde la direcci\u00f3n final del ATTR_RECORD actual, a trav\u00e9s del campo de longitud del ATTR_RECORD actual. El problema es que durante la iteraci\u00f3n, cuando el kernel calcula la direcci\u00f3n final del ATTR_RECORD actual, el kernel puede desencadenar un error de desbordamiento de enteros al ejecutar `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a-\u0026gt;length))`. Esto puede envolverse, lo que lleva a una iteraci\u00f3n eterna en sistemas de 32 bits. Este parche lo resuelve a\u00f1adiendo algunas comprobaciones en el c\u00e1lculo de la direcci\u00f3n final del ATTR_RECORD actual durante la iteraci\u00f3n."
    }
  ],
  "id": "CVE-2022-49762",
  "lastModified": "2025-11-06T21:59:25.140",
  "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": "2025-05-01T15:15:58.933",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "NVD-CWE-noinfo"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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