KVM: arm64: vgic-its: Don't dereference a NULL collection on ITT save (Linux Linux)
En bref
- Source
- NVD
- EPSS
- EPSS 0.18 % · centile 8 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Received
Rechercher sur…
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Don't dereference a NULL collection on ITT save MAPC with V=0 drops ite->collection but leaves the ITE on the device's ITT list, and vgic_its_save_ite() dereferences it unconditionally. A guest that issues MAPD, MAPTI and then MAPC(V=0) therefore oopses the host when the VMM issues KVM_DEV_ARM_ITS_SAVE_TABLES to migrate it. That sequence is UNPREDICTABLE per the architecture, but KVM already handles the resulting state in the translate, MOVI and DISCARD paths. Save a zeroed entry, which vgic_its_restore_ite() reads back as invalid. Skipping the ITE instead would leave the ITT slot holding whatever is in guest memory, and restore rejects an entry naming a collection the restored collection table does not have.
Références
- https://git.kernel.org/stable/c/df829e4fe235b3a0dbf830986d81c040d3d2e940
- https://git.kernel.org/stable/c/0fb71211146e39cf67811ccb873d2770a9c129ac
- https://git.kernel.org/stable/c/566d0f99aec92280ce403f22068eb07241a79e2a
- https://git.kernel.org/stable/c/dd0c3e6c03e3bb3fd7c0fa422230020674c5c25e
- https://git.kernel.org/stable/c/2c3a87ad3d3935c43d465cd2465db9020f9e898f
- https://git.kernel.org/stable/c/3d4c26b16a04a084fe0bde08ccdd8086570f8bbe
- https://git.kernel.org/stable/c/36df368861d2664291298feeb37dfef43fcae670
- https://git.kernel.org/stable/c/c6c156d931c33b92362383cf76f6d6e1291dcbfe
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | Linux |
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-80512
- GCVE · GCVE-0-2026-89912
Avis du CERT-FR
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1374 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1372 — Multiples vulnérabilités dans les produits SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1335 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected eff484e0298da5a4d18ca82f5454c557fd942af5 < df829e4fe235b3a0dbf830986d81c040d3d2e940 ; affected eff484e0298da5a4d18ca82f5454c557fd942af5 < 0fb71211146e39cf67811ccb873d2770a9c129ac ; affected eff484e0298da5a4d18ca82f5454c557fd942af5 < 566d0f99aec92280ce403f22068eb07241a79e2a ; affected eff484e0298da5a4d18ca82f5454c557fd942af5 < dd0c3e6c03e3bb3fd7c0fa422230020674c5c25e ; affected eff484e0298da5a4d18ca82f5454c557fd942af5 < 2c3a87ad3d3935c43d465cd2465db9020f9e898f ; affected eff484e0298da5a4d18ca82f5454c557fd942af5 < 3d4c26b16a04a084fe0bde08ccdd8086570f8bbe |
| Linux · Linux | affected 4.12 ; unaffected 0 < 4.12 ; unaffected 5.10.273 ≤ 5.10.* ; unaffected 5.15.224 ≤ 5.15.* ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.160 ≤ 6.6.* |
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 |