Vulnerability-Lookup

GHSA-6325-FCFV-PXV6

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-24 18:32

Details

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

PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc

pci_epf_alloc_doorbell() stores the allocated doorbell message array in epf->db_msg/epf->num_db before requesting MSI vectors. If MSI allocation fails, the array is freed but the EPF state may still point to freed memory.

Clear epf->db_msg and epf->num_db on the MSI allocation failure path so that later cleanup cannot double-free the array and callers can retry allocation.

Also return -EBUSY when doorbells have already been allocated to prevent leaking or overwriting an existing allocation.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53067"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:19Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc\n\npci_epf_alloc_doorbell() stores the allocated doorbell message array in\nepf-\u003edb_msg/epf-\u003enum_db before requesting MSI vectors. If MSI allocation\nfails, the array is freed but the EPF state may still point to freed\nmemory.\n\nClear epf-\u003edb_msg and epf-\u003enum_db on the MSI allocation failure path so\nthat later cleanup cannot double-free the array and callers can retry\nallocation.\n\nAlso return -EBUSY when doorbells have already been allocated to prevent\nleaking or overwriting an existing allocation.",
  "id": "GHSA-6325-fcfv-pxv6",
  "modified": "2026-06-24T18:32:45Z",
  "published": "2026-06-24T18:32:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53067"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-53067 (GCVE-0-2026-53067)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30

Title

PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc

Summary

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc pci_epf_alloc_doorbell() stores the allocated doorbell message array in epf->db_msg/epf->num_db before requesting MSI vectors. If MSI allocation fails, the array is freed but the EPF state may still point to freed memory. Clear epf->db_msg and epf->num_db on the MSI allocation failure path so that later cleanup cannot double-free the array and callers can retry allocation. Also return -EBUSY when doorbells have already been allocated to prevent leaking or overwriting an existing allocation.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/175717cfc06cab79f…
https://git.kernel.org/stable/c/3c25587fbf8797b92…
https://git.kernel.org/stable/c/1cba96c0a795124c3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1c3b002c6bf684b445a7107609979bca5f21bc03 , < 175717cfc06cab79f84cd037d66dda1b8564cd9e (git) Affected: 1c3b002c6bf684b445a7107609979bca5f21bc03 , < 3c25587fbf8797b92090b064a6d239a873e55fb1 (git) Affected: 1c3b002c6bf684b445a7107609979bca5f21bc03 , < 1cba96c0a795124c3229293ed7b5b5765e66f259 (git)
Linux	Linux	Affected: 6.17 Unaffected: 0 , < 6.17 (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/endpoint/pci-ep-msi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "175717cfc06cab79f84cd037d66dda1b8564cd9e",
              "status": "affected",
              "version": "1c3b002c6bf684b445a7107609979bca5f21bc03",
              "versionType": "git"
            },
            {
              "lessThan": "3c25587fbf8797b92090b064a6d239a873e55fb1",
              "status": "affected",
              "version": "1c3b002c6bf684b445a7107609979bca5f21bc03",
              "versionType": "git"
            },
            {
              "lessThan": "1cba96c0a795124c3229293ed7b5b5765e66f259",
              "status": "affected",
              "version": "1c3b002c6bf684b445a7107609979bca5f21bc03",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/endpoint/pci-ep-msi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc\n\npci_epf_alloc_doorbell() stores the allocated doorbell message array in\nepf-\u003edb_msg/epf-\u003enum_db before requesting MSI vectors. If MSI allocation\nfails, the array is freed but the EPF state may still point to freed\nmemory.\n\nClear epf-\u003edb_msg and epf-\u003enum_db on the MSI allocation failure path so\nthat later cleanup cannot double-free the array and callers can retry\nallocation.\n\nAlso return -EBUSY when doorbells have already been allocated to prevent\nleaking or overwriting an existing allocation."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:30:09.492Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1"
        },
        {
          "url": "https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259"
        }
      ],
      "title": "PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53067",
    "datePublished": "2026-06-24T16:30:09.492Z",
    "dateReserved": "2026-06-09T07:44:35.382Z",
    "dateUpdated": "2026-06-24T16:30:09.492Z",
    "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.

Action not permitted

GHSA-6325-FCFV-PXV6

CVE-2026-53067 (GCVE-0-2026-53067)

Tags

Sightings

Nomenclature