CVE-2021-28692
Severity CVSS v4.0:
Pending analysis
Type:
CWE-269
Improper Privilege Management
Publication date:
30/06/2021
Last modified:
12/07/2021
Description
inappropriate x86 IOMMU timeout detection / handling IOMMUs process commands issued to them in parallel with the operation of the CPU(s) issuing such commands. In the current implementation in Xen, asynchronous notification of the completion of such commands is not used. Instead, the issuing CPU spin-waits for the completion of the most recently issued command(s). Some of these waiting loops try to apply a timeout to fail overly-slow commands. The course of action upon a perceived timeout actually being detected is inappropriate: - on Intel hardware guests which did not originally cause the timeout may be marked as crashed, - on AMD hardware higher layer callers would not be notified of the issue, making them continue as if the IOMMU operation succeeded.
Impact
Base Score 3.x
7.10
Severity 3.x
HIGH
Base Score 2.0
5.60
Severity 2.0
MEDIUM
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* | 3.2.0 (including) |
To consult the complete list of CPE names with products and versions, see this page