CVE-2026-64475vfio/pci: Release the VGA arbiter client on register_device() failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 87856f9af04eaacf9848710625a4ffee1d020fa9 builds before 0f2a35a0c7ea7da347b814750eaa78adf3582381; from 4aeec3984ddc853f7c65903bde472ffdef738bae before 8d65decde9afd2bd78bcfffdc0df73b82a0b5509; from 4aeec3984ddc853f7c65903bde472ffdef738bae before ef4c38d30b3744e89eb5048218904bb629ea8d47; from 4aeec3984ddc853f7c65903bde472ffdef738bae before 9e0a3f642e607848669235f5069f35640abbfc88; from 4aeec3984ddc853f7c65903bde472ffdef738bae before 42d758a09d2c46c42357ecde9a5492f015bde2e5; from 4aeec3984ddc853f7c65903bde472ffdef738bae before 52adb2dff7ce3d8430e2bdc5988b618a430def85; from 4aeec3984ddc853f7c65903bde472ffdef738bae before 278a5659c391fe5afe5f9ce1bad1fd24e90144f1; from 4aeec3984ddc853f7c65903bde472ffdef738bae before daedde7f024ecf88bc8e832ed40cf2c795f0796a; and 5 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/0f2a35a0c7ea7da347b814750eaa78adf3582381
- https://git.kernel.org/stable/c/8d65decde9afd2bd78bcfffdc0df73b82a0b5509
- https://git.kernel.org/stable/c/ef4c38d30b3744e89eb5048218904bb629ea8d47
- https://git.kernel.org/stable/c/9e0a3f642e607848669235f5069f35640abbfc88
- https://git.kernel.org/stable/c/42d758a09d2c46c42357ecde9a5492f015bde2e5
- https://git.kernel.org/stable/c/52adb2dff7ce3d8430e2bdc5988b618a430def85
- https://git.kernel.org/stable/c/278a5659c391fe5afe5f9ce1bad1fd24e90144f1
- https://git.kernel.org/stable/c/daedde7f024ecf88bc8e832ed40cf2c795f0796a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.