fkie_cve-2025-21724
Vulnerability from fkie_nvd
Published
2025-02-27 02:15
Modified
2025-02-27 02:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index() where shifting the constant "1" (of type int) by bitmap->mapped.pgshift (an unsigned long value) could result in undefined behavior. The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds 31 (e.g., pgshift = 63) the shift operation overflows, as the result cannot be represented in a 32-bit type. To resolve this, the constant is updated to "1UL", promoting it to an unsigned long type to match the operand's type.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()\n\nResolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index()\nwhere shifting the constant \"1\" (of type int) by bitmap-\u003emapped.pgshift\n(an unsigned long value) could result in undefined behavior.\n\nThe constant \"1\" defaults to a 32-bit \"int\", and when \"pgshift\" exceeds\n31 (e.g., pgshift = 63) the shift operation overflows, as the result\ncannot be represented in a 32-bit type.\n\nTo resolve this, the constant is updated to \"1UL\", promoting it to an\nunsigned long type to match the operand\u0027s type."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommufd/iova_bitmap: Se soluciona el problema de desplazamiento fuera de los l\u00edmites en iova_bitmap_offset_to_index() Se soluciona un problema de desplazamiento fuera de los l\u00edmites de UBSAN en iova_bitmap_offset_to_index() donde desplazar la constante \"1\" (de tipo int) por bitmap-\u0026gt;mapped.pgshift (un valor unsigned long) podr\u00eda resultar en un comportamiento indefinido. La constante \"1\" tiene como valor predeterminado un \"int\" de 32 bits, y cuando \"pgshift\" supera los 31 (por ejemplo, pgshift = 63) la operaci\u00f3n de desplazamiento se desborda, ya que el resultado no se puede representar en un tipo de 32 bits. Para resolver esto, la constante se actualiza a \"1UL\", promovi\u00e9ndola a un tipo unsigned long para que coincida con el tipo del operando."
    }
  ],
  "id": "CVE-2025-21724",
  "lastModified": "2025-02-27T02:15:16.113",
  "metrics": {},
  "published": "2025-02-27T02:15:16.113",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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