---
id: CVE-2026-98712
title: 'KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq

  Referencing the last interrupt inserted in an LR is rather fragile, as
  this interrupt can vanish if…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 6da5e537f5afe091658e846da1949d7e557d2ade <
    8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c
  - >-
    Linux >= 6da5e537f5afe091658e846da1949d7e557d2ade <
    19bc5d79ece613f242b5ec03921a3b465321bfed
  - Linux cd28ca4c27ed5929f61bbed8a967c20519facb88
  - Linux >= 6.19.9 < 6.20
  - Linux 7.0
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:46:44.857Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98712'
references:
  - url: 'https://git.kernel.org/stable/c/8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c'
  - url: 'https://git.kernel.org/stable/c/19bc5d79ece613f242b5ec03921a3b465321bfed'
tags:
  - cve.org
ingestedAt: '2026-10-18T16:47:32.511Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq

Referencing the last interrupt inserted in an LR is rather fragile, as
this interrupt can vanish if a concurrently unmapped LPI.

Solve this by bumping up the refcount on the interrupt when populating
last_lr_irq, and drop it at vgic_prune_ap_list() time, when LPIs are
being reclaimed.

## Affected

- `Linux >= 6da5e537f5afe091658e846da1949d7e557d2ade < 8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c`
- `Linux >= 6da5e537f5afe091658e846da1949d7e557d2ade < 19bc5d79ece613f242b5ec03921a3b465321bfed`
- `Linux cd28ca4c27ed5929f61bbed8a967c20519facb88`
- `Linux >= 6.19.9 < 6.20`
- `Linux 7.0`

## Remediation

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