Vulnerabilities > CVE-2021-27379

CVSS 7.8 - HIGH

Attack vector

LOCAL

Attack complexity

LOW

Privileges required

LOW

Confidentiality impact

HIGH

Integrity impact

HIGH

Availability impact

HIGH

local

low complexity

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