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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-89912

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

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • eff484e0298da5a4d18ca82f5454c557fd942af5 to < dd0c3e6c03e3bb3fd7c0fa422230020674c5c25eaffected
  • eff484e0298da5a4d18ca82f5454c557fd942af5 to < 2c3a87ad3d3935c43d465cd2465db9020f9e898faffected
  • eff484e0298da5a4d18ca82f5454c557fd942af5 to < 3d4c26b16a04a084fe0bde08ccdd8086570f8bbeaffected
  • eff484e0298da5a4d18ca82f5454c557fd942af5 to < 36df368861d2664291298feeb37dfef43fcae670affected
  • eff484e0298da5a4d18ca82f5454c557fd942af5 to < c6c156d931c33b92362383cf76f6d6e1291dcbfeaffected

Linux Linux

Default version status: affected

  • 4.12affected
  • 0 to < 4.12unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.113 to ≤ 6.12.*unaffected
  • 6.18.51 to ≤ 6.18.*unaffected
  • 7.2.5 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References