Description
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.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Linux / Linux5d74781ebc86c5fa9e9d6934024c505412de9b52 – 4f1000a30f67cf7d328059242776a858611d5ef9
- Linux / Linux5d74781ebc86c5fa9e9d6934024c505412de9b52 – d97708701434ce72968e771976aaf9d3438fcafd
- Linux / Linux6.19 – 6.19
- Linux / Linux0 – 6.19
- Linux / Linux7.0.10 – 7.0.*
- Linux / Linux7.1 – *