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CVE-2026-64475

Full vulnerability record from the local CVENow database.

Description

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.

Severity
HIGH
CVSS score
8.8 (v3.1)
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-25 10:17:32.980000
Last modified
2026-10-19 21:17:40.540000
View original CVE JSON 
{
  "id": "CVE-2026-64475",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-07-25T10:17:32.980",
  "lastModified": "2026-10-19T21:17:40.540",
  "vulnStatus": "Received",
  "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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/vfio/pci/vfio_pci_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "87856f9af04eaacf9848710625a4ffee1d020fa9",
              "lessThan": "0f2a35a0c7ea7da347b814750eaa78adf3582381",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "lessThan": "8d65decde9afd2bd78bcfffdc0df73b82a0b5509",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "lessThan": "ef4c38d30b3744e89eb5048218904bb629ea8d47",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "lessThan": "9e0a3f642e607848669235f5069f35640abbfc88",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "lessThan": "42d758a09d2c46c42357ecde9a5492f015bde2e5",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "lessThan": "52adb2dff7ce3d8430e2bdc5988b618a430def85",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "lessThan": "278a5659c391fe5afe5f9ce1bad1fd24e90144f1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4aeec3984ddc853f7c65903bde472ffdef738bae",
              "lessThan": "daedde7f024ecf88bc8e832ed40cf2c795f0796a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "d62dccb417cf972c978bf3c68a7d5e846bcf953e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "6694b8daffac5a8661071f085608afc78f7acd08",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5.10.37",
              "lessThan": "5.10.261",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.11.21",
              "lessThan": "5.12",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.12.4",
              "lessThan": "5.13",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/vfio/pci/vfio_pci_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.13",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.13",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.261",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.212",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.178",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.145",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.96",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.39",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.4",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 6.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-16T15:41:16.888282Z",
          "id": "CVE-2026-64475",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "references": [
    {
      "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"
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}