AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-27379

HIGH · CVSS 7.8 EPSS 0.36%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-18 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-27379
Severity
HIGH
CVSS
7.8
EPSS
0.36%

Original NVD 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.