IOMMU Vulnerability in PCI Devices by Vendor Impacting System Integrity
CVE-2022-26360

7.8HIGH

Key Information:

Vendor

Xen Project
Status
Xen
Vendor
CVE Published:
5 April 2022

What is CVE-2022-26360?

This vulnerability arises from improper handling of Reserved Memory Regions (RMRR) in Intel VT-d and Unity Mapping ranges in AMD-Vi. The issue can occur in certain PCI devices that require continuous access to their respective mappings for correct operation. When a device associated with a reserved memory region becomes active, any failure to maintain the necessary continuous accessibility can lead to unpredictable behavior. This may manifest as DMA faults or memory corruption, compromising system stability and security.

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Deploy the Patch

Affected Version(s)

xen consult Xen advisory XSA-400

References

https://xenbits.xenproject.org/xsa/advisory-400.txt
http://xenbits.xen.org/xsa/advisory-400.html
http://www.openwall.com/lists/oss-security/2022/04/05/3
mailing-list

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'Aspects of this issue were discovered by Jan Beulich of SUSE and\nRoger Pau Monné of Citrix.'}]}}}
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