fkie_cve-2025-21724
Vulnerability from fkie_nvd
Published
2025-02-27 02:15
Modified
2025-10-23 13:06
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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/38ac76fc06bc6826a3e4b12a98efbe98432380a9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9cPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "23CFC977-3B4F-4678-B36A-9517EF29ADEE",
              "versionEndExcluding": "6.1.129",
              "versionStartIncluding": "6.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A6D70701-9CB6-4222-A957-00A419878993",
              "versionEndExcluding": "6.6.76",
              "versionStartIncluding": "6.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2897389C-A8C3-4D69-90F2-E701B3D66373",
              "versionEndExcluding": "6.12.13",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6D4116B1-1BFD-4F23-BA84-169CC05FC5A3",
              "versionEndExcluding": "6.13.2",
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            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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": "2025-10-23T13:06:00.863",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-02-27T02:15:16.113",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe"
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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