Vulnerability Description
Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. In the logic establishing these mappings, error handling was flawed, resulting in such mappings to potentially remain in place when they should have been removed again. Respective guests would then gain access to memory regions which they aren't supposed to have access to.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | >= 4.0.0 |
Related Weaknesses (CWE)
References
- https://xenbits.xenproject.org/xsa/advisory-460.htmlPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2024/08/14/2Mailing ListThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-460.htmlPatchVendor Advisory
FAQ
What is CVE-2024-31145?
CVE-2024-31145 is a vulnerability with a CVSS score of 7.5 (HIGH). Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typical...
How severe is CVE-2024-31145?
CVE-2024-31145 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-2024-31145?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen.