CVE-2026-64475

vfio/pci: Release the VGA arbiter client on register_device() failure

State: Published
Severity: 8.8 High
Published: Jul 25, 2026
Updated: Oct 19, 2026
Reserved: Jul 19, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	Linux

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	87856f9af04eaacf9848710625a4ffee1d020fa9 to before 0f2a35a0c7ea7da347b814750eaa78adf3582381Affected 4aeec3984ddc853f7c65903bde472ffdef738bae to before 8d65decde9afd2bd78bcfffdc0df73b82a0b5509Affected 4aeec3984ddc853f7c65903bde472ffdef738bae to before ef4c38d30b3744e89eb5048218904bb629ea8d47Affected 4aeec3984ddc853f7c65903bde472ffdef738bae to before 9e0a3f642e607848669235f5069f35640abbfc88Affected 4aeec3984ddc853f7c65903bde472ffdef738bae to before 42d758a09d2c46c42357ecde9a5492f015bde2e5Affected 4aeec3984ddc853f7c65903bde472ffdef738bae to before 52adb2dff7ce3d8430e2bdc5988b618a430def85Affected 4aeec3984ddc853f7c65903bde472ffdef738bae to before 278a5659c391fe5afe5f9ce1bad1fd24e90144f1Affected 4aeec3984ddc853f7c65903bde472ffdef738bae to before daedde7f024ecf88bc8e832ed40cf2c795f0796aAffected d62dccb417cf972c978bf3c68a7d5e846bcf953eAffected 6694b8daffac5a8661071f085608afc78f7acd08Affected 5.10.37 to before 5.10.261Affected 5.11.21 to before 5.12Affected 5.12.4 to before 5.13Affected
LinuxLinux	5.13Affected before 5.13Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.96 through 6.12.Not affected 6.18.39 through 6.18.Not affected 7.1.4 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

87856f9af04eaacf9848710625a4ffee1d020fa9 to before 0f2a35a0c7ea7da347b814750eaa78adf3582381Affected
4aeec3984ddc853f7c65903bde472ffdef738bae to before 8d65decde9afd2bd78bcfffdc0df73b82a0b5509Affected
4aeec3984ddc853f7c65903bde472ffdef738bae to before ef4c38d30b3744e89eb5048218904bb629ea8d47Affected
4aeec3984ddc853f7c65903bde472ffdef738bae to before 9e0a3f642e607848669235f5069f35640abbfc88Affected
4aeec3984ddc853f7c65903bde472ffdef738bae to before 42d758a09d2c46c42357ecde9a5492f015bde2e5Affected
4aeec3984ddc853f7c65903bde472ffdef738bae to before 52adb2dff7ce3d8430e2bdc5988b618a430def85Affected
4aeec3984ddc853f7c65903bde472ffdef738bae to before 278a5659c391fe5afe5f9ce1bad1fd24e90144f1Affected
4aeec3984ddc853f7c65903bde472ffdef738bae to before daedde7f024ecf88bc8e832ed40cf2c795f0796aAffected
d62dccb417cf972c978bf3c68a7d5e846bcf953eAffected
6694b8daffac5a8661071f085608afc78f7acd08Affected
5.10.37 to before 5.10.261Affected
5.11.21 to before 5.12Affected
5.12.4 to before 5.13Affected

LinuxLinux

5.13Affected
before 5.13Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.96 through 6.12.*Not affected
6.18.39 through 6.18.*Not affected
7.1.4 through 7.1.*Not affected
7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.