high7.8
CVE-2021-27379
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 o…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Xen | Xen | from 3.2.0 before 4.12.0 |
| Debian | Debian Linux | Version 10.0 |
References
- NVD record
- CVE.org record
- http://www.openwall.com/lists/oss-security/2021/02/23/1
- http://xenbits.xen.org/xsa/advisory-366.html
- https://www.debian.org/security/2021/dsa-4888
- https://xenbits.xen.org/xsa/advisory-366.html
- http://www.openwall.com/lists/oss-security/2021/02/23/1
- http://xenbits.xen.org/xsa/advisory-366.html
- https://www.debian.org/security/2021/dsa-4888
- https://xenbits.xen.org/xsa/advisory-366.html