Detections
Analytics
Alpine: xen: security update to 4.13.4-r1
high Tenable Cloud Security Plugin ID 407785
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- 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. (CVE-2021-28702)
See Also
Plugin Details
Severity: High
ID: 407785
Version: Revision 1.26
Type: Local
Published: 10/31/2023
Updated: 7/2/2026
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Medium
Score: 5
Percentile: 95.11
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Temporal Score: 3.4
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2021-28702
CVSS v3
Risk Factor: High
Base Score: 7.6
Temporal Score: 6.6
Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 8/5/2021
Reference Information
CVE: CVE-2021-28702
IAVB: 2021-B-0044-S