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
Link Resource
http://www.openwall.com/lists/oss-security/2021/02/23/1 Mailing List Third Party Advisory
http://xenbits.xen.org/xsa/advisory-366.html Mitigation Patch Vendor Advisory
https://www.debian.org/security/2021/dsa-4888 Third Party Advisory
https://xenbits.xen.org/xsa/advisory-366.html Patch Vendor Advisory
History

No history.

cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2021-02-18T15:05:25

Updated: 2021-04-11T11:06:19

Reserved: 2021-02-18T00:00:00


Link: CVE-2021-27379

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2021-02-18T17:15:15.867

Modified: 2022-05-27T17:09:48.977


Link: CVE-2021-27379

JSON object: View

cve-icon Redhat Information

No data.