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PRIOn knowledge basePRION:CVE-2021-27379HistoryFeb 18, 2021 - 5:15 p.m.
Design/Logic Flaw
2021-02-1817:15:00
PRIOn knowledge base
www.prio-n.com
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An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.
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