FKIE_CVE-2026-53067

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-53067",
  "lastModified": "2026-06-24T17:17:19.780",
  "metrics": {},
  "published": "2026-06-24T17:17:19.780",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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