CVE-2024-31145 (GCVE-0-2024-31145)

Vulnerability from cvelistv5 – Published: 2024-09-25 10:31 – Updated: 2024-09-25 13:29
VLAI?
Title
error handling in x86 IOMMU identity mapping
Summary
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.
Severity ?
7.5 (High)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
XEN
References
Impacted products
Vendor Product Version
Xen Xen Unknown: consult Xen advisory XSA-460
Create a notification for this product.
Credits
This issue was discovered by Teddy Astie of Vates and diagnosed as a security issue by Jan Beulich of SUSE.
Show details on NVD website
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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