CVE-2025-58149 Affecting xen package, versions *
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- published25 Oct 2025
- disclosed31 Oct 2025
Introduced: 25 Oct 2025
NewCVE-2025-58149 (opens in a new tab)How to fix?
There is no fixed version for Debian:12 xen.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.