---
id: CVE-2026-80684
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

  The airq_iv_create() can return NULL on failure, but the return value was
  never checked
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

  The airq_iv_create() can return NULL on failure, but the return value was
  never checked. If it fails, z…
severity: critical
cvss: 9.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
published: '2026-08-28'
updated: '2026-08-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80684'
references:
  - url: 'https://git.kernel.org/stable/c/0a95abe964400771ad82b027d7b84a0d183cd0db'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8bf09b9b7d3232806df95f409581f8a9fd99a3fa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/96099486b63985801c9c6ef22505e9aa635b2d20'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d1a103dc9016c25e7423ce5841a5cc2df76d59f3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/df947d85e164a50a29d43a96e814f69ab1d0f7ed'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e137d082325bbcae780087b57501d38585e625d9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00144
epssPercentile: 0.04022
ingestedAt: '2026-08-30T04:47:10.646Z'
---

## Overview

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

KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

The airq_iv_create() can return NULL on failure, but the return value was
never checked. If it fails, zdev->aibv will be NULL and fail when
dereferenced in kvm_zpci_set_airq(). Add a NULL check and free the
previously allocated AISB bit and zdev->aisb on failure.

## Remediation

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