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.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade xen | Apr 12, 2021 | Feb 18, 2021 |
| Suse | — | Upgrade xenUpgrade xen-develUpgrade xen-toolsUpgrade xen-tools-domUUpgrade xen-libsUpgrade xen-doc-htmlUpgrade xen-libs-32bit | Apr 20, 2021 | Feb 18, 2021 |
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