{"id":"CVE-2026-64475","title":"vfio/pci: Release the VGA arbiter client on register_device() failure","summary":"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…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 87856f9af04eaacf9848710625a4ffee1d020fa9 < 0f2a35a0c7ea7da347b814750eaa78adf3582381","Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 8d65decde9afd2bd78bcfffdc0df73b82a0b5509","Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < ef4c38d30b3744e89eb5048218904bb629ea8d47","Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 9e0a3f642e607848669235f5069f35640abbfc88","Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 42d758a09d2c46c42357ecde9a5492f015bde2e5","Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 52adb2dff7ce3d8430e2bdc5988b618a430def85","Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 278a5659c391fe5afe5f9ce1bad1fd24e90144f1","Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < daedde7f024ecf88bc8e832ed40cf2c795f0796a","Linux d62dccb417cf972c978bf3c68a7d5e846bcf953e","Linux 6694b8daffac5a8661071f085608afc78f7acd08","Linux >= 5.10.37 < 5.10.261","Linux >= 5.11.21 < 5.12","Linux >= 5.12.4 < 5.13","Linux 5.13"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:41:16.888282Z"},"published":"2026-07-25","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:42:37.949Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64475","references":[{"url":"https://git.kernel.org/stable/c/0f2a35a0c7ea7da347b814750eaa78adf3582381"},{"url":"https://git.kernel.org/stable/c/8d65decde9afd2bd78bcfffdc0df73b82a0b5509"},{"url":"https://git.kernel.org/stable/c/ef4c38d30b3744e89eb5048218904bb629ea8d47"},{"url":"https://git.kernel.org/stable/c/9e0a3f642e607848669235f5069f35640abbfc88"},{"url":"https://git.kernel.org/stable/c/42d758a09d2c46c42357ecde9a5492f015bde2e5"},{"url":"https://git.kernel.org/stable/c/52adb2dff7ce3d8430e2bdc5988b618a430def85"},{"url":"https://git.kernel.org/stable/c/278a5659c391fe5afe5f9ce1bad1fd24e90144f1"},{"url":"https://git.kernel.org/stable/c/daedde7f024ecf88bc8e832ed40cf2c795f0796a"}],"tags":["cve.org"],"epss":0.00139,"epssPercentile":0.02892,"ingestedAt":"2026-10-16T17:24:46.823Z","slug":"CVE-2026-64475","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 87856f9af04eaacf9848710625a4ffee1d020fa9 < 0f2a35a0c7ea7da347b814750eaa78adf3582381`\n- `Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 8d65decde9afd2bd78bcfffdc0df73b82a0b5509`\n- `Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < ef4c38d30b3744e89eb5048218904bb629ea8d47`\n- `Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 9e0a3f642e607848669235f5069f35640abbfc88`\n- `Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 42d758a09d2c46c42357ecde9a5492f015bde2e5`\n- `Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 52adb2dff7ce3d8430e2bdc5988b618a430def85`\n- `Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < 278a5659c391fe5afe5f9ce1bad1fd24e90144f1`\n- `Linux >= 4aeec3984ddc853f7c65903bde472ffdef738bae < daedde7f024ecf88bc8e832ed40cf2c795f0796a`\n- `Linux d62dccb417cf972c978bf3c68a7d5e846bcf953e`\n- `Linux 6694b8daffac5a8661071f085608afc78f7acd08`\n- `Linux >= 5.10.37 < 5.10.261`\n- `Linux >= 5.11.21 < 5.12`\n- `Linux >= 5.12.4 < 5.13`\n- `Linux 5.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}