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CVE-2021-27379
Published: Feb 18, 2021
Modified: Aug 3, 2024
PUBLISHED
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.
| Vendor | Product | Versions |
|---|---|---|
n/a | n/a | affected n/a |
References
http://xenbits.xen.org/xsa/advisory-366.html
x_refsource_CONFIRM
https://xenbits.xen.org/xsa/advisory-366.html
x_refsource_MISC
[oss-security] 20210223 Xen Security Advisory 366 v2 (CVE-2021-27379) - missed flush in XSA-321 backport
mailing-list
x_refsource_MLIST
DSA-4888
vendor-advisory
x_refsource_DEBIAN
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