---
id: CVE-2026-89912
title: |-
  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_sav…
summary: |-
  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_sav…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= eff484e0298da5a4d18ca82f5454c557fd942af5 <
    3d4c26b16a04a084fe0bde08ccdd8086570f8bbe
  - >-
    Linux >= eff484e0298da5a4d18ca82f5454c557fd942af5 <
    36df368861d2664291298feeb37dfef43fcae670
  - >-
    Linux >= eff484e0298da5a4d18ca82f5454c557fd942af5 <
    c6c156d931c33b92362383cf76f6d6e1291dcbfe
  - Linux 4.12
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:17.413'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89912'
references:
  - url: 'https://git.kernel.org/stable/c/36df368861d2664291298feeb37dfef43fcae670'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3d4c26b16a04a084fe0bde08ccdd8086570f8bbe'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c6c156d931c33b92362383cf76f6d6e1291dcbfe'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89912.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89912'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2535138'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89912'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89912'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89912.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-16T10:53:53.974Z'
cwe:
  - CWE-476
scores:
  nvd: 7.1
  vendor: 5.5
epss: 0.00174
epssPercentile: 0.07117
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89912.json)