CVE-2026-64475
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.
How to fix
- Linux Linux0f2a35a0c7ea7da347b814750eaa78adf3582381, 8d65decde9afd2bd78bcfffdc0df73b82a0b5509, ef4c38d30b3744e89eb5048218904bb629ea8d47, 9e0a3f642e607848669235f5069f35640abbfc88, 42d758a09d2c46c42357ecde9a5492f015bde2e5, 52adb2dff7ce3d8430e2bdc5988b618a430def85, 278a5659c391fe5afe5f9ce1bad1fd24e90144f1, daedde7f024ecf88bc8e832ed40cf2c795f0796a, 5.10.261, 5.12, 5.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 87856f9af04eaacf9848710625a4ffee1d020fa9 ≤ v < 0f2a35a0c7ea7da347b814750eaa78adf3582381, 4aeec3984ddc853f7c65903bde472ffdef738bae ≤ v < 8d65decde9afd2bd78bcfffdc0df73b82a0b5509, 4aeec3984ddc853f7c65903bde472ffdef738bae ≤ v < ef4c38d30b3744e89eb5048218904bb629ea8d47, 4aeec3984ddc853f7c65903bde472ffdef738bae ≤ v < 9e0a3f642e607848669235f5069f35640abbfc88, 4aeec3984ddc853f7c65903bde472ffdef738bae ≤ v < 42d758a09d2c46c42357ecde9a5492f015bde2e5, 4aeec3984ddc853f7c65903bde472ffdef738bae ≤ v < 52adb2dff7ce3d8430e2bdc5988b618a430def85, 4aeec3984ddc853f7c65903bde472ffdef738bae ≤ v < 278a5659c391fe5afe5f9ce1bad1fd24e90144f1, 4aeec3984ddc853f7c65903bde472ffdef738bae ≤ v < daedde7f024ecf88bc8e832ed40cf2c795f0796a, d62dccb417cf972c978bf3c68a7d5e846bcf953e, 6694b8daffac5a8661071f085608afc78f7acd08, 5.10.37 ≤ v < 5.10.261, 5.11.21 ≤ v < 5.12, 5.12.4 ≤ v < 5.13, 5.13 | 0f2a35a0c7ea7da347b814750eaa78adf3582381, 8d65decde9afd2bd78bcfffdc0df73b82a0b5509, ef4c38d30b3744e89eb5048218904bb629ea8d47, 9e0a3f642e607848669235f5069f35640abbfc88, 42d758a09d2c46c42357ecde9a5492f015bde2e5, 52adb2dff7ce3d8430e2bdc5988b618a430def85, 278a5659c391fe5afe5f9ce1bad1fd24e90144f1, daedde7f024ecf88bc8e832ed40cf2c795f0796a, 5.10.261, 5.12, 5.13 |
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