CVE - CVE-2021-27379

CVE-ID
CVE-2021-27379	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:http://xenbits.xen.org/xsa/advisory-366.html DEBIAN:DSA-4888 URL:https://www.debian.org/security/2021/dsa-4888 MISC:https://xenbits.xen.org/xsa/advisory-366.html MLIST:[oss-security] 20210223 Xen Security Advisory 366 v2 (CVE-2021-27379) - missed flush in XSA-321 backport URL:http://www.openwall.com/lists/oss-security/2021/02/23/1
Assigning CNA
MITRE Corporation
Date Record Created
20210218	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210218)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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