CVE-2026-53322

In the Linux kernel, the following vulnerability has been resolved:

vfio/pci: Clean up DMABUFs before disabling function

On device shutdown, make vfio_pci_core_close_device() call

vfio_pci_dma_buf_cleanup() before the function is disabled via

vfio_pci_core_disable(). This ensures that all access via DMABUFs is

revoked before the function's BARs become inaccessible.

This fixes an issue where, if the function is disabled first, a tiny

window exists in which the function's MSE is cleared and yet BARs

could still be accessed via the DMABUF. The resources would also be

freed and up for grabs by a different driver.