VDB
DEBIAN-CVE-2021-27379
DEBIAN-CVE-2021-27379
PUBLISHED
CVSS 7.800000190734863 HIGH
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.
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | xen | 0, 0, 0 |
| Debian:11 | xen | 0, 0, 0 |
| Debian:14 | xen | 0, 0, 0 |
| Debian:12 | xen | 0, 0, 0 |
Timeline
- Feb 18, 2021 CVE Published
- Apr 28, 2026 CVE Updated