References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

Change History

http://www.openwall.com/lists/oss-security/2025/10/24/1

http://xenbits.xen.org/xsa/advisory-476.html

CWE-672

CWE-284

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-284

When passing through PCI devices, the detach logic in libxl won't remove
access permissions to any 64bit memory BARs the device might have.  As a
result a domain can still have access any 64bit memory BAR when such
device is no longer assigned to the domain.

For PV domains the permission leak allows the domain itself to map the memory
in the page-tables.  For HVM it would require a compromised device model or
stubdomain to map the leaked memory into the HVM domain p2m.

https://xenbits.xenproject.org/xsa/advisory-476.html