---
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'
cwe:
  - CWE-476
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    96099486b63985801c9c6ef22505e9aa635b2d20
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    0a95abe964400771ad82b027d7b84a0d183cd0db
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    df947d85e164a50a29d43a96e814f69ab1d0f7ed
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    e137d082325bbcae780087b57501d38585e625d9
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    d1a103dc9016c25e7423ce5841a5cc2df76d59f3
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    8bf09b9b7d3232806df95f409581f8a9fd99a3fa
  - Linux 6.0
published: '2026-08-28'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:18:06.443'
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
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80684.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80684'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2525395'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80684'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80684'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026082802-CVE-2026-80684-a2a8@gregkh/T
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00196
epssPercentile: 0.09185
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T19:19:58.006717Z'
scores:
  nvd: 9.3
  vendor: 5.5
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.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80684.json)