---
id: CVE-2026-68454
title: 'KVM: s390: pci: Fix handling of AIF enable without AISB'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  KVM: s390: pci: Fix handling of AIF enable without AISB

  When a guest seeks to register IRQs without a summary bit specified,
  ensure that the associated GAITE then stor…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    f887df91826e72b570c5e9298e66dd929f09edde
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    3ef3190e30601b2688bdc64169b938b8d7f42010
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    d48b9b096d11e31690c0a4988f65f21b64c01b2a
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    df72596278b0e22dac5ef2881e9221a3a2c4ed11
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    124a3769c43713a11a93a821b313e61ad5110cb8
  - >-
    Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <
    3e3aa6da87d30a0064a17b836685cd43c90a3572
  - Linux 6.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:49:23.202156Z'
published: '2026-08-13'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:53:14.564Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68454'
references:
  - url: 'https://git.kernel.org/stable/c/f887df91826e72b570c5e9298e66dd929f09edde'
  - url: 'https://git.kernel.org/stable/c/3ef3190e30601b2688bdc64169b938b8d7f42010'
  - url: 'https://git.kernel.org/stable/c/d48b9b096d11e31690c0a4988f65f21b64c01b2a'
  - url: 'https://git.kernel.org/stable/c/df72596278b0e22dac5ef2881e9221a3a2c4ed11'
  - url: 'https://git.kernel.org/stable/c/124a3769c43713a11a93a821b313e61ad5110cb8'
  - url: 'https://git.kernel.org/stable/c/3e3aa6da87d30a0064a17b836685cd43c90a3572'
tags:
  - cve.org
epss: 0.00129
epssPercentile: 0.02254
ingestedAt: '2026-10-16T17:24:46.868Z'
---

## Overview

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

KVM: s390: pci: Fix handling of AIF enable without AISB

When a guest seeks to register IRQs without a summary bit specified,
ensure that the associated GAITE then stores 0 for the guest AISB
location instead of virt_to_phys(page_address(NULL)).

## Affected

- `Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < f887df91826e72b570c5e9298e66dd929f09edde`
- `Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 3ef3190e30601b2688bdc64169b938b8d7f42010`
- `Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < d48b9b096d11e31690c0a4988f65f21b64c01b2a`
- `Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < df72596278b0e22dac5ef2881e9221a3a2c4ed11`
- `Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 124a3769c43713a11a93a821b313e61ad5110cb8`
- `Linux >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 3e3aa6da87d30a0064a17b836685cd43c90a3572`
- `Linux 6.0`

## Remediation

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