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.
Metrics
Affected Vendors & Products
References
History
Fri, 22 Nov 2024 12:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
References |
|
Wed, 25 Sep 2024 14:30:00 +0000
Type | Values Removed | Values Added |
---|---|---|
First Time appeared |
Xen
Xen xen |
|
Weaknesses | CWE-400 | |
CPEs | cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:* | |
Vendors & Products |
Xen
Xen xen |
|
Metrics |
cvssV3_1
|
Wed, 25 Sep 2024 10:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
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. | |
Title | error handling in x86 IOMMU identity mapping | |
References |
|
MITRE
Status: PUBLISHED
Assigner: XEN
Published: 2024-09-25T10:31:43.523Z
Updated: 2024-09-25T13:29:33.308Z
Reserved: 2024-03-28T18:14:12.893Z
Link: CVE-2024-31145
Vulnrichment
Updated: 2024-09-25T11:02:50.356Z
NVD
Status : Awaiting Analysis
Published: 2024-09-25T11:15:12.133
Modified: 2024-11-21T09:12:55.410
Link: CVE-2024-31145
Redhat
No data.