CVE-2022-49762

Estado: AnalizadaMedia (5.5)—

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.

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This patch solves it by adding some checks on calculating end address of current ATTR_RECORD during iteration.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.22%
Percentil entre todas las CVEs puntuadas: 11
Fecha de la puntuación: 5/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

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  "id": "CVE-2022-49762",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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  "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->length))`.  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 comprobación 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 están uno al lado del otro, el kernel puede obtener el siguiente ATTR_RECORD desde la dirección final del ATTR_RECORD actual, a través del campo de longitud del ATTR_RECORD actual. El problema es que durante la iteración, cuando el kernel calcula la dirección 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-&gt;length))`. Esto puede envolverse, lo que lleva a una iteración eterna en sistemas de 32 bits. Este parche lo resuelve añadiendo algunas comprobaciones en el cálculo de la dirección final del ATTR_RECORD actual durante la iteración."
    }
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  "lastModified": "2026-06-17T05:19:05.120",
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