CVE-2021-27379

State: Published
Severity: Not scored
Published: Feb 18, 2021
Updated: Aug 3, 2024
Reserved: Feb 18, 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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
n/an/a	n/aAffected

References

http://xenbits.xen.org/xsa/advisory-366.html
https://xenbits.xen.org/xsa/advisory-366.html
[oss-security] 20210223 Xen Security Advisory 366 v2 (CVE-2021-27379) - missed flush in XSA-321 backportmailing-list
DSA-4888vendor-advisory

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