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CVE-2022-49553

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: validate BOOT sectors_per_clusters

When the NTFS BOOT sectors_per_clusters field is > 0x80, it represents a shift value. Make sure that the shift value is not too large before using it (NTFS max cluster size is 2MB). Return -EVINVAL if it too large.

This prevents negative shift values and shift values that are larger than the field size.

Prevents this UBSAN error:

Detalles técnicos trazas, registros y código del informe original
 UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16
 shift exponent -192 is negative

CVSS

Probabilidad de explotación (EPSS)

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

Referencias

JSON original (NVD)

Mostrar
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          "value": "CWE-190"
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate BOOT sectors_per_clusters\n\nWhen the NTFS BOOT sectors_per_clusters field is > 0x80, it represents a\nshift value.  Make sure that the shift value is not too large before using\nit (NTFS max cluster size is 2MB).  Return -EVINVAL if it too large.\n\nThis prevents negative shift values and shift values that are larger than\nthe field size.\n\nPrevents this UBSAN error:\n\n UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16\n shift exponent -192 is negative"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/ntfs3: validar sectores_por_clústeres de BOOT Cuando el campo sectores_por_clústeres de BOOT de NTFS es > 0x80, representa un valor de desplazamiento. Asegúrese de que el valor de desplazamiento no sea demasiado grande antes de usarlo (el tamaño máximo del clúster de NTFS es 2 MB). Devuelva -EVINVAL si es demasiado grande. Esto evita valores de desplazamiento negativos y valores de desplazamiento que sean más grandes que el tamaño del campo. Previene este error de UBSAN: UBSAN: desplazamiento fuera de los límites en ../fs/ntfs3/super.c:673:16 el exponente de desplazamiento -192 es negativo"
    }
  ],
  "lastModified": "2026-08-04T10:17:51.030",
  "configurations": [
    {
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