FKIE_CVE-2026-64475

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-11-03 18:15
Severity
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Release the VGA arbiter client on register_device() failure The re-order in the Fixes commit below displaced vfio_pci_vga_init() as the last failure point of what is now vfio_pci_core_register_device() without introducing an unwind for the VGA arbiter registration. In current kernels this is mostly benign because vfio_pci_set_decode() only uses pci_dev state, but the original failure path could leave a callback with a freed vdev cookie. The stale registration also becomes unsafe again once the callback follows drvdata to the vfio device. Add the required VGA unwind callout.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f2a35a0c7ea7da347b814750eaa78adf3582381
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/278a5659c391fe5afe5f9ce1bad1fd24e90144f1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42d758a09d2c46c42357ecde9a5492f015bde2e5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52adb2dff7ce3d8430e2bdc5988b618a430def85
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8d65decde9afd2bd78bcfffdc0df73b82a0b5509
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e0a3f642e607848669235f5069f35640abbfc88
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/daedde7f024ecf88bc8e832ed40cf2c795f0796a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef4c38d30b3744e89eb5048218904bb629ea8d47
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vfio/pci/vfio_pci_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0f2a35a0c7ea7da347b814750eaa78adf3582381",
              "status": "affected",
              "version": "87856f9af04eaacf9848710625a4ffee1d020fa9",
              "versionType": "git"
            },
            {
              "lessThan": "8d65decde9afd2bd78bcfffdc0df73b82a0b5509",
              "status": "affected",
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "versionType": "git"
            },
            {
              "lessThan": "ef4c38d30b3744e89eb5048218904bb629ea8d47",
              "status": "affected",
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "versionType": "git"
            },
            {
              "lessThan": "9e0a3f642e607848669235f5069f35640abbfc88",
              "status": "affected",
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "versionType": "git"
            },
            {
              "lessThan": "42d758a09d2c46c42357ecde9a5492f015bde2e5",
              "status": "affected",
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "versionType": "git"
            },
            {
              "lessThan": "52adb2dff7ce3d8430e2bdc5988b618a430def85",
              "status": "affected",
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "versionType": "git"
            },
            {
              "lessThan": "278a5659c391fe5afe5f9ce1bad1fd24e90144f1",
              "status": "affected",
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "versionType": "git"
            },
            {
              "lessThan": "daedde7f024ecf88bc8e832ed40cf2c795f0796a",
              "status": "affected",
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d62dccb417cf972c978bf3c68a7d5e846bcf953e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6694b8daffac5a8661071f085608afc78f7acd08",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.261",
              "status": "affected",
              "version": "5.10.37",
              "versionType": "semver"
            },
            {
              "lessThan": "5.12",
              "status": "affected",
              "version": "5.11.21",
              "versionType": "semver"
            },
            {
              "lessThan": "5.13",
              "status": "affected",
              "version": "5.12.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/vfio/pci/vfio_pci_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nvfio/pci: Release the VGA arbiter client on register_device() failure\n\nThe re-order in the Fixes commit below displaced vfio_pci_vga_init() as\nthe last failure point of what is now vfio_pci_core_register_device()\nwithout introducing an unwind for the VGA arbiter registration.\n\nIn current kernels this is mostly benign because vfio_pci_set_decode()\nonly uses pci_dev state, but the original failure path could leave a\ncallback with a freed vdev cookie.  The stale registration also becomes\nunsafe again once the callback follows drvdata to the vfio device.\n\nAdd the required VGA unwind callout."
    }
  ],
  "id": "CVE-2026-64475",
  "lastModified": "2026-11-03T18:15:39.353",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 6.0,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-64475",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-16T15:41:16.888282Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-25T10:17:32.980",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0f2a35a0c7ea7da347b814750eaa78adf3582381"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/278a5659c391fe5afe5f9ce1bad1fd24e90144f1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/42d758a09d2c46c42357ecde9a5492f015bde2e5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52adb2dff7ce3d8430e2bdc5988b618a430def85"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8d65decde9afd2bd78bcfffdc0df73b82a0b5509"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9e0a3f642e607848669235f5069f35640abbfc88"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/daedde7f024ecf88bc8e832ed40cf2c795f0796a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ef4c38d30b3744e89eb5048218904bb629ea8d47"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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