FKIE_CVE-2026-64475
Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-27 05:16
Severity
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
Impacted products
| Vendor | Product | Version |
|---|
{
"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-rc2",
"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": "2026-07-27T05:16:53.927",
"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"
}
]
},
"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": "Received"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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