VDB
ALPINE-CVE-2021-28702
ALPINE-CVE-2021-28702
PUBLISHED
CVSS 7.599999904632568 HIGH
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.
Risk Scores
CVSS v3.1
7.599999904632568
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.18 | xen | 4.3.3-r0, 4.3.2-r4, 4.3.2-r3 |
| Alpine:v3.12 | xen | 4.10.0-r1, 4.3.2-r1, 4.3.2-r2 |
| Alpine:v3.16 | xen | 4.13.1-r5, 4.2.0-r3, 4.2.0-r2 |
| Alpine:v3.17 | xen | 4.10.1-r2, 4.1.3-r0, 4.11.1-r1 |
| Alpine:v3.21 | xen | 4.7.0-r0, 4.6.3-r1, 4.6.3-r0 |
| Alpine:v3.15 | xen | 4.3.1-r3, 4.9.0-r0, 4.9.0-r1 |
| Alpine:v3.13 | xen | 4.11.1-r0, 4.11.1-r1, 4.12.0-r0 |
| Alpine:v3.11 | xen | 4.13.2-r1, 4.0.1-r3, 4.0.1-r0 |
| Alpine:v3.23 | xen | 4.9.1-r2, 4.9.1-r1, 4.9.1-r0 |
| Alpine:v3.22 | xen | 4.2.1-r1, 4.2.1-r11, 4.2.1-r2 |
| Alpine:v3.20 | xen | 4.13.1-r5, 4.9.1-r3, 4.9.1-r2 |
| Alpine:v3.14 | xen | 4.3.0-r8, 4.3.1-r0, 4.3.1-r1 |
| Alpine:v3.19 | xen | 4.2.1-r2, 4.2.1-r3, 4.2.1-r4 |
Timeline
- Oct 6, 2021 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch