CVE-2022-26358

 

Published at: - 05-04-2022 03:15

Last modified: - 29-07-2022 08:41

Total changes: - 6

Description

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] 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. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://xenbits.xenproject.org/xsa/advisory-400.txt
• http://xenbits.xen.org/xsa/advisory-400.html
• [oss-security] 20220405 Xen Security Advisory 400 v2 (CVE-2022-26358,CVE-2022-26359,CVE-2022-26360,CVE-2022-26361) - IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues-Mailing List, Patch, Third Party Advisory
• DSA-5117-Third Party Advisory
• FEDORA-2022-dfbf7e2372-Mailing List, Third Party Advisory
• FEDORA-2022-64b2c02d29-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2022-26358

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures