Vulnerability-Lookup

GHSA-47GJ-CQH4-PQ8C

Vulnerability from github – Published: 2025-12-24 12:30 – Updated: 2025-12-24 12:30

Details

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

iommufd: Make sure to zero vfio_iommu_type1_info before copying to user

Missed a zero initialization here. Most of the struct is filled with a copy_from_user(), however minsz for that copy is smaller than the actual struct by 8 bytes, thus we don't fill the padding.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54034"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T11:15:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Make sure to zero vfio_iommu_type1_info before copying to user\n\nMissed a zero initialization here. Most of the struct is filled with\na copy_from_user(), however minsz for that copy is smaller than the\nactual struct by 8 bytes, thus we don\u0027t fill the padding.",
  "id": "GHSA-47gj-cqh4-pq8c",
  "modified": "2025-12-24T12:30:28Z",
  "published": "2025-12-24T12:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54034"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7adcec686e4d699c169d34c722132b2bce5232cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b3551ead616318ea155558cdbe7e91495b8d9b33"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2023-54034 (GCVE-0-2023-54034)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:56 – Updated: 2026-05-11 19:54

Title

iommufd: Make sure to zero vfio_iommu_type1_info before copying to user

Summary

In the Linux kernel, the following vulnerability has been resolved: iommufd: Make sure to zero vfio_iommu_type1_info before copying to user Missed a zero initialization here. Most of the struct is filled with a copy_from_user(), however minsz for that copy is smaller than the actual struct by 8 bytes, thus we don't fill the padding.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/7adcec686e4d699c1…
https://git.kernel.org/stable/c/b3551ead616318ea1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d624d6652a65ad4f47a58b8651a1ec1163bb81d3 , < 7adcec686e4d699c169d34c722132b2bce5232cb (git) Affected: d624d6652a65ad4f47a58b8651a1ec1163bb81d3 , < b3551ead616318ea155558cdbe7e91495b8d9b33 (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.2.3 , ≤ 6.2.* (semver) Unaffected: 6.3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/vfio_compat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7adcec686e4d699c169d34c722132b2bce5232cb",
              "status": "affected",
              "version": "d624d6652a65ad4f47a58b8651a1ec1163bb81d3",
              "versionType": "git"
            },
            {
              "lessThan": "b3551ead616318ea155558cdbe7e91495b8d9b33",
              "status": "affected",
              "version": "d624d6652a65ad4f47a58b8651a1ec1163bb81d3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/vfio_compat.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
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              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.3",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "6.2",
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                }
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              "operator": "OR"
            }
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        }
      ],
      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Make sure to zero vfio_iommu_type1_info before copying to user\n\nMissed a zero initialization here. Most of the struct is filled with\na copy_from_user(), however minsz for that copy is smaller than the\nactual struct by 8 bytes, thus we don\u0027t fill the padding."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:54:09.017Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7adcec686e4d699c169d34c722132b2bce5232cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3551ead616318ea155558cdbe7e91495b8d9b33"
        }
      ],
      "title": "iommufd: Make sure to zero vfio_iommu_type1_info before copying to user",
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        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54034",
    "datePublished": "2025-12-24T10:56:01.509Z",
    "dateReserved": "2025-12-24T10:53:46.180Z",
    "dateUpdated": "2026-05-11T19:54:09.017Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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