github - ghsa-q92x-chq8-5c2g

GHSA-Q92X-CHQ8-5C2G

Vulnerability from github – Published: 2025-12-08 03:31 – Updated: 2025-12-08 03:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40293"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-08T01:16:01Z",
    "severity": null
  },
  "details": "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": "GHSA-q92x-chq8-5c2g",
  "modified": "2025-12-08T03:31:01Z",
  "published": "2025-12-08T03:31:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40293"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40293 (GCVE-0-2025-40293)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2025-12-08 00:46

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/07105e61882ff4a7d…
	https://git.kernel.org/stable/c/4c8a4f1d34eced168…
	https://git.kernel.org/stable/c/de7f2c67ceb1941b0…
	https://git.kernel.org/stable/c/dbf316fc90aa954dc…
	https://git.kernel.org/stable/c/cb30dfa75d55eced3…

Impacted products

Vendor

Product

Version

Linux

Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < 07105e61882ff4a7d58db63cc5f9e90c6c60506c (git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < 4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69 (git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < de7f2c67ceb1941b05b04ac35458a03e93cc57b1 (git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < dbf316fc90aa954dcd5440817f4b944627ed63e0 (git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < cb30dfa75d55eced379a42fd67bd5fb7ec38555e (git)

Linux

Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": [
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          ],
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.159",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.117",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-08T00:46:16.850Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69"
        },
        {
          "url": "https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e"
        }
      ],
      "title": "iommufd: Don\u0027t overflow during division for dirty tracking",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40293",
    "datePublished": "2025-12-08T00:46:16.850Z",
    "dateReserved": "2025-04-16T07:20:57.185Z",
    "dateUpdated": "2025-12-08T00:46:16.850Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-Q92X-CHQ8-5C2G

CVE-2025-40293 (GCVE-0-2025-40293)

Tags

Sightings

Nomenclature