Xen xen
At a glance
- Source
- NVD
- EPSS
- EPSS 0.29 % · percentile 21 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- XEN
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-269 — Improper Privilege Management
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.6 | AV:L/AC:L/Au:N/C:P/I:N/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-15349
- GCVE · GCVE-0-2021-28692
CERT-FR advisories
- CERTFR-2021-AVI-460 — Multiples vulnérabilités dans Citrix Hypervisor · cert.ssi.gouv.fr
- CERTFR-2021-AVI-453 — Multiples vulnérabilités dans Xen · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*≥ 3.2.0
Affected products
| Product | Versions |
|---|---|
| Xen · xen | affected 4.13.x |
| Xen · xen | affected 4.14.x |
| Xen · xen | affected 4.15.x |
| Xen · xen | affected xen-unstable |
| Xen · xen | affected 4.12.x |
| Xen · xen | affected 4.11.x |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |