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Debian: CVE-2021-27379: xen -- security update

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Debian: CVE-2021-27379: xen -- security update

Severity
6
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:C)
Published
02/18/2021
Created
04/13/2021
Added
04/12/2021
Modified
04/13/2021

Description

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.

Solution(s)

  • debian-upgrade-xen

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