7.1

CVE-2026-89912

KVM: arm64: vgic-its: Don't dereference a NULL collection on ITT save

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version eff484e0298da5a4d18ca82f5454c557fd942af5
Version < 3d4c26b16a04a084fe0bde08ccdd8086570f8bbe
Status affected
Version eff484e0298da5a4d18ca82f5454c557fd942af5
Version < 36df368861d2664291298feeb37dfef43fcae670
Status affected
Version eff484e0298da5a4d18ca82f5454c557fd942af5
Version < c6c156d931c33b92362383cf76f6d6e1291dcbfe
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 4.12
Status affected
Version 0
Version < 4.12
Status unaffected
Version <= 6.18.*
Version 6.18.51
Status unaffected
Version <= 7.2.*
Version 7.2.5
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.071
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.1 2.5 4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/3d4c26b16a04a084fe0bde08ccdd8086570f8bbe
https://git.kernel.org/stable/c/36df368861d2664291298feeb37dfef43fcae670
https://git.kernel.org/stable/c/c6c156d931c33b92362383cf76f6d6e1291dcbfe