Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | >= 4.0.0 |
Related Weaknesses (CWE)
References
- https://xenbits.xenproject.org/xsa/advisory-476.htmlPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2025/10/24/1Mailing ListPatchThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-476.htmlPatchVendor Advisory
FAQ
What is CVE-2025-58149?
CVE-2025-58149 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2025-58149?
CVE-2025-58149 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-58149?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen.