CVE-2023-46839 — pci: phantom functions assigned to incorrect contexts

Description (CNA)

PCI devices can make use of a functionality called phantom functions, that when enabled allows the device to generate requests using the IDs of functions that are otherwise unpopulated. This allows a device to extend the number of outstanding requests. Such phantom functions need an IOMMU context setup, but failure to setup the context is not fatal when the device is assigned. Not failing device assignment when such failure happens can lead to the primary device being assigned to a guest, while some of the phantom functions are assigned to a different domain.

Affected (CNA)

Vendor / product	Versions
Xen / Xen	unknown consult Xen advisory XSA-449

CWE

No CWE identifiers supplied.

References

https://xenbits.xenproject.org/xsa/advisory-449.html

ADP enrichment

CVE

No English description supplied.

https://xenbits.xenproject.org/xsa/advisory-449.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XLL6SQ6IKFYXLYWITYZCRV5IBRK5G35R/
http://xenbits.xen.org/xsa/advisory-449.html

CISA-ADP

No English description supplied.

No references supplied.