CVE-2026-64475

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

VendorProductVersion RangeStatus
LinuxLinux87856f9af04eaacf9848710625a4ffee1d020fa9 < 0f2a35a0c7ea7da347b814750eaa78adf3582381affected
LinuxLinux4aeec3984ddc853f7c65903bde472ffdef738bae < 8d65decde9afd2bd78bcfffdc0df73b82a0b5509affected
LinuxLinux4aeec3984ddc853f7c65903bde472ffdef738bae < ef4c38d30b3744e89eb5048218904bb629ea8d47affected
LinuxLinux4aeec3984ddc853f7c65903bde472ffdef738bae < 9e0a3f642e607848669235f5069f35640abbfc88affected
LinuxLinux4aeec3984ddc853f7c65903bde472ffdef738bae < 42d758a09d2c46c42357ecde9a5492f015bde2e5affected
LinuxLinux4aeec3984ddc853f7c65903bde472ffdef738bae < 52adb2dff7ce3d8430e2bdc5988b618a430def85affected
LinuxLinux4aeec3984ddc853f7c65903bde472ffdef738bae < 278a5659c391fe5afe5f9ce1bad1fd24e90144f1affected
LinuxLinux4aeec3984ddc853f7c65903bde472ffdef738bae < daedde7f024ecf88bc8e832ed40cf2c795f0796aaffected
LinuxLinuxd62dccb417cf972c978bf3c68a7d5e846bcf953eaffected
LinuxLinux6694b8daffac5a8661071f085608afc78f7acd08affected
LinuxLinux5.10.37 < 5.10.261affected
LinuxLinux5.11.21 < 5.12affected
LinuxLinux5.12.4 < 5.13affected
LinuxLinux5.13affected
LinuxLinux0 < 5.13unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc2 <= *unaffected

Weaknesses

References