DEBIAN-CVE-2021-28702
- Source
- https://security-tracker.debian.org/tracker/CVE-2021-28702
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-28702.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-28702
- Upstream
- Published
- 2021-10-06T14:15:07Z
- Modified
- 2025-09-25T23:26:56.558345Z
- Severity
-
- 7.6 (High) CVSS_V3 - CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR"). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption.
- References
Affected packages
Debian:11 / xen
Package
- Name
- xen
- Purl
- pkg:deb/debian/xen?arch=source
Debian:12 / xen
Package
- Name
- xen
- Purl
- pkg:deb/debian/xen?arch=source
Debian:13 / xen
Package
- Name
- xen
- Purl
- pkg:deb/debian/xen?arch=source
Debian:14 / xen
Package
- Name
- xen
- Purl
- pkg:deb/debian/xen?arch=source