CVE-2026-64475
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 87856f9af04eaacf9848710625a4ffee1d020fa9 < 0f2a35a0c7ea7da347b814750eaa78adf3582381 | affected |
| Linux | Linux | 4aeec3984ddc853f7c65903bde472ffdef738bae < 8d65decde9afd2bd78bcfffdc0df73b82a0b5509 | affected |
| Linux | Linux | 4aeec3984ddc853f7c65903bde472ffdef738bae < ef4c38d30b3744e89eb5048218904bb629ea8d47 | affected |
| Linux | Linux | 4aeec3984ddc853f7c65903bde472ffdef738bae < 9e0a3f642e607848669235f5069f35640abbfc88 | affected |
| Linux | Linux | 4aeec3984ddc853f7c65903bde472ffdef738bae < 42d758a09d2c46c42357ecde9a5492f015bde2e5 | affected |
| Linux | Linux | 4aeec3984ddc853f7c65903bde472ffdef738bae < 52adb2dff7ce3d8430e2bdc5988b618a430def85 | affected |
| Linux | Linux | 4aeec3984ddc853f7c65903bde472ffdef738bae < 278a5659c391fe5afe5f9ce1bad1fd24e90144f1 | affected |
| Linux | Linux | 4aeec3984ddc853f7c65903bde472ffdef738bae < daedde7f024ecf88bc8e832ed40cf2c795f0796a | affected |
| Linux | Linux | d62dccb417cf972c978bf3c68a7d5e846bcf953e | affected |
| Linux | Linux | 6694b8daffac5a8661071f085608afc78f7acd08 | affected |
| Linux | Linux | 5.10.37 < 5.10.261 | affected |
| Linux | Linux | 5.11.21 < 5.12 | affected |
| Linux | Linux | 5.12.4 < 5.13 | affected |
| Linux | Linux | 5.13 | affected |
| Linux | Linux | 0 < 5.13 | unaffected |
| Linux | Linux | 5.10.261 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.212 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.178 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.145 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.96 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.39 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.4 <= 7.1.* | unaffected |
| Linux | Linux | 7.2-rc2 <= * | unaffected |
Weaknesses
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
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.