Vulnerabilities > CVE-2021-27379

CVSS 5.9 - MEDIUM

Attack vector

LOCAL

Attack complexity

MEDIUM

Privileges required

NONE

Confidentiality impact

PARTIAL

Integrity impact

PARTIAL

Availability impact

COMPLETE

local

xen

debian

NVD

Published: 2021-02-18

Updated: 2022-05-27

Summary

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.

Vulnerable Configurations

Part	Description	Count
OS	Xen XEN XEN 3.2.0 XEN XEN 4.0.0 XEN XEN 4.0.1 XEN XEN 4.0.2 XEN XEN 4.0.3 XEN XEN 4.0.4 XEN XEN 4.1.0 XEN XEN 4.1.1 XEN XEN 4.1.2 XEN XEN 4.1.3 XEN XEN 4.1.4 XEN XEN 4.1.5 XEN XEN 4.2.0 XEN XEN 4.2.1 XEN XEN 4.2.2 XEN XEN 4.3.0 XEN XEN 4.4.0 XEN XEN 4.5.0 XEN XEN 4.6.0 XEN XEN 4.6.1 XEN XEN 4.6.3 XEN XEN 4.6.4 XEN XEN 4.6.5 XEN XEN 4.6.6 XEN XEN 4.7.0 XEN XEN 4.7.1 XEN XEN 4.7.2 XEN XEN 4.7.3 XEN XEN 4.7.4 XEN XEN 4.7.6 XEN XEN 4.8.0 XEN XEN 4.8.1 XEN XEN 4.8.2 XEN XEN 4.8.3 XEN XEN 4.8.4 XEN XEN 4.9.0 XEN XEN 4.9.1 XEN XEN 4.9.2 XEN XEN 4.10.0 XEN XEN 4.10.1 XEN XEN 4.11.0 XEN XEN 4.11.4	42
OS	Debian Debian Debian Linux 10.0	1

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Summary

Vulnerable Configurations

References

Vulnerabilities > CVE-2021-27379