FKIE_CVE-2025-40293

Vulnerability from fkie_nvd - Published: 2025-12-08 01:16 - Updated: 2026-06-17 09:21
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/iova_bitmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "07105e61882ff4a7d58db63cc5f9e90c6c60506c",
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "versionType": "git"
            },
            {
              "lessThan": "4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69",
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "versionType": "git"
            },
            {
              "lessThan": "de7f2c67ceb1941b05b04ac35458a03e93cc57b1",
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "versionType": "git"
            },
            {
              "lessThan": "dbf316fc90aa954dcd5440817f4b944627ed63e0",
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "versionType": "git"
            },
            {
              "lessThan": "cb30dfa75d55eced379a42fd67bd5fb7ec38555e",
              "status": "affected",
              "version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/iova_bitmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Don\u0027t overflow during division for dirty tracking\n\nIf pgshift is 63 then BITS_PER_TYPE(*bitmap-\u003ebitmap) * 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."
    }
  ],
  "id": "CVE-2025-40293",
  "lastModified": "2026-06-17T09:21:36.540",
  "metrics": {},
  "published": "2025-12-08T01:16:01.293",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}


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