CVE-2021-28702 (GCVE-0-2021-28702)
Vulnerability from cvelistv5
Published
2021-10-06 13:13
Modified
2024-08-03 21:47
Severity ?
CWE
  • unknown
Summary
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.
References
security@xen.org http://www.openwall.com/lists/oss-security/2021/10/07/2 Mailing List, Third Party Advisory
security@xen.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OIHEJ3R3EH5DYI2I5UMD2ULJ2ELA3EX/
security@xen.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FDPRMOBBLS74ONYP3IXZZXSTLKR7GRQB/
security@xen.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRAWV6PO2KUGVZTESERECOBUBZ6X45I7/
security@xen.org https://security.gentoo.org/glsa/202208-23 Third Party Advisory
security@xen.org https://www.debian.org/security/2021/dsa-5017 Third Party Advisory
security@xen.org https://xenbits.xenproject.org/xsa/advisory-386.txt Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2021/10/07/2 Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OIHEJ3R3EH5DYI2I5UMD2ULJ2ELA3EX/
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FDPRMOBBLS74ONYP3IXZZXSTLKR7GRQB/
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRAWV6PO2KUGVZTESERECOBUBZ6X45I7/
af854a3a-2127-422b-91ae-364da2661108 https://security.gentoo.org/glsa/202208-23 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://www.debian.org/security/2021/dsa-5017 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://xenbits.xenproject.org/xsa/advisory-386.txt Vendor Advisory
Impacted products
Vendor Product Version
Xen xen Version: 4.12.x   < unspecified
Patch: next of xen-unstable   < unspecified
 Create a notification for this product.
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}


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