CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's VFIO PCI subsystem, specifically during the device registration process, where a failure to register the VGA arbiter client could lead to the use of a freed vdev cookie. This flaw poses a high risk, as it may allow for unsafe operations on stale registrations, potentially leading to system instability or exploitation. Organizations using affected Linux kernel versions should prioritize patching this vulnerability to mitigate the associated risks.
Original NVD 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.