CVE-2026-89912
Açıklama (NVD)
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.
Yayın: 16.09.2026 · Son değişiklik: 30.10.2026
CVSS 3.1 metrikleri
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
| Saldırı vektörü | Yerel |
| Karmaşıklık | Düşük |
| Gereken yetki | Yok |
| Kullanıcı etkileşimi | Gerekmez |
| Kapsam | Değişir |
| Gizlilik | Yok |
| Bütünlük | Yok |
| Erişilebilirlik | Yüksek |
Hesaplanan temel puan: 7.1. CVSS hesaplayıcıda incele
Referanslar
- https://git.kernel.org/stable/c/0fb71211146e39cf67811ccb873d2770a9c129ac
- https://git.kernel.org/stable/c/2c3a87ad3d3935c43d465cd2465db9020f9e898f
- https://git.kernel.org/stable/c/36df368861d2664291298feeb37dfef43fcae670
- https://git.kernel.org/stable/c/3d4c26b16a04a084fe0bde08ccdd8086570f8bbe
- https://git.kernel.org/stable/c/566d0f99aec92280ce403f22068eb07241a79e2a
- https://git.kernel.org/stable/c/c6c156d931c33b92362383cf76f6d6e1291dcbfe
- https://git.kernel.org/stable/c/dd0c3e6c03e3bb3fd7c0fa422230020674c5c25e
- https://git.kernel.org/stable/c/df829e4fe235b3a0dbf830986d81c040d3d2e940