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CVE-2021-28702

UNKNOWN
Published 2021-10-06T13:13:21
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No CVSS data available

Description

PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR"). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Xen

xen

Affected Versions:

unspecified 4.12.x next of xen-unstable

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-pcvc-mv96-7jh6

Advisory Details

PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR"). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-28702
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/2OIHEJ3R3EH5DYI2I5UMD2ULJ2ELA3EX
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/FDPRMOBBLS74ONYP3IXZZXSTLKR7GRQB
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/TRAWV6PO2KUGVZTESERECOBUBZ6X45I7
WEB https://security.gentoo.org/glsa/202208-23
WEB https://www.debian.org/security/2021/dsa-5017
WEB https://xenbits.xenproject.org/xsa/advisory-386.txt
WEB http://www.openwall.com/lists/oss-security/2021/10/07/2

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: August 16, 2022

References

https://xenbits.xenproject.org/xsa/advisory-386.txt
http://www.openwall.com/lists/oss-security/2021/10/07/2
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRAWV6PO2KUGVZTESERECOBUBZ6X45I7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FDPRMOBBLS74ONYP3IXZZXSTLKR7GRQB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OIHEJ3R3EH5DYI2I5UMD2ULJ2ELA3EX/
https://www.debian.org/security/2021/dsa-5017
https://security.gentoo.org/glsa/202208-23
Published: 2021-10-06T13:13:21
Last Modified: 2024-08-03T21:47:32.997Z
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