CVE-2025-58149
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductXen
PublishedOct 31, 2025
First seenOct 31, 2025
Weakness typeCWE-672CWE-672
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| xen xen | 4.0.0 ≤ v | — |
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