CVE-2021-27379
7.8
HIGH
CVSS 3.1
EPSS 0.07%
描述
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.
如何修補 CVE-2021-27379
要修補 CVE-2021-27379,請將受影響套件升級到下列已修補版本。
- —升級至 4.14.0+80-gd101b417b7-1 或更新版本
CVE-2021-27379 正在被利用嗎?
低 — EPSS 為 0.1%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 4.14.0+80-gd101b417b7-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |