Bug 2314650 (CVE-2024-31145) - CVE-2024-31145 xen: error handling in x86 IOMMU identity mapping
Summary: CVE-2024-31145 xen: error handling in x86 IOMMU identity mapping
Keywords:
Status: NEW
Alias: CVE-2024-31145
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2314784
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-09-25 11:20 UTC by OSIDB Bzimport
Modified: 2024-09-25 20:42 UTC (History)
0 users

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed:
Embargoed:


Attachments (Terms of Use)

Description OSIDB Bzimport 2024-09-25 11:20:30 UTC
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.


Note You need to log in before you can comment on or make changes to this bug.