grant-table: double version change race (Xen Xen)
En bref
- Source
- NVD
- EPSS
- EPSS 0.15 % · centile 4 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- XEN
- Statut NVD
- Awaiting Analysis
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Description
XSA-501 was about issues with v1 -> v2 and v2 -> v1 changes racing certain other grant table operations. Sadly a v2 -> v1 -> v2 change has yet another effect which wasn't accounted for: During the first change, status pages would be freed. During the second change they would be allocated again. Hence across the full pair of change the addresses of the status pages may change, rendering stale previously calculated pointers into the status array.
Faiblesses (CWE)
- CWE-362 — Situation de compétition
Références
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | CISA-ADP |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-98827
- GCVE · GCVE-0-2026-79610
Avis du CERT-FR
- CERTFR-2026-AVI-1310 — Multiples vulnérabilités dans les produits Citrix · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1302 — Multiples vulnérabilités dans Xen · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Xen · Xen | unknown consult Xen advisory XSA-517 |
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 |