CVE-2026-64475

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0f2a35a0c7ea7da347b814750eaa78adf3582381
https://git.kernel.org/stable/c/278a5659c391fe5afe5f9ce1bad1fd24e90144f1
https://git.kernel.org/stable/c/42d758a09d2c46c42357ecde9a5492f015bde2e5
https://git.kernel.org/stable/c/52adb2dff7ce3d8430e2bdc5988b618a430def85
https://git.kernel.org/stable/c/8d65decde9afd2bd78bcfffdc0df73b82a0b5509
https://git.kernel.org/stable/c/9e0a3f642e607848669235f5069f35640abbfc88
https://git.kernel.org/stable/c/daedde7f024ecf88bc8e832ed40cf2c795f0796a
https://git.kernel.org/stable/c/ef4c38d30b3744e89eb5048218904bb629ea8d47

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-25 10:17

Updated : 2026-08-17 05:17

NVD link : CVE-2026-64475

Mitre link : CVE-2026-64475

CVE.ORG link : CVE-2026-64475

JSON object : View

Products Affected

No product.

CWE

No CWE.

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"versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.96", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.39", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.4", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/vfio/pci/vfio_pci_core.c"], "defaultStatus": "affected"}]}], "published": "2026-07-25T10:17:32.980", "references": [{"url": "https://git.kernel.org/stable/c/0f2a35a0c7ea7da347b814750eaa78adf3582381", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": 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"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."}], "lastModified": "2026-08-17T05:17:53.140", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}