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CVE-2025-40293

Estado: AplazadaSin puntuar—

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

iommufd: Don't overflow during division for dirty tracking

If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow to 0 and this triggers divide by 0.

In this case the index should just be 0, so reorganize things to divide by shift and avoid hitting any overflows.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-40293",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "lessThan": "07105e61882ff4a7d58db63cc5f9e90c6c60506c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "lessThan": "4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "lessThan": "de7f2c67ceb1941b05b04ac35458a03e93cc57b1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "lessThan": "dbf316fc90aa954dcd5440817f4b944627ed63e0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "lessThan": "cb30dfa75d55eced379a42fd67bd5fb7ec38555e",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/iommu/iommufd/iova_bitmap.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.1",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/iommu/iommufd/iova_bitmap.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-08T01:16:01.293",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Don't overflow during division for dirty tracking\n\nIf pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow\nto 0 and this triggers divide by 0.\n\nIn this case the index should just be 0, so reorganize things to divide\nby shift and avoid hitting any overflows."
    }
  ],
  "lastModified": "2026-06-17T09:21:36.540",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}