---
id: CVE-2026-80547
title: 's390/vfio_ccw: Implement a crw lock'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  s390/vfio_ccw: Implement a crw lock

  Unlike the channel_program struct, which covers synchronous I/O
  submissions and asynchronous interrupts, the CRW region relies
  excl…
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 >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee <
    3c94d4179bcc19e01b28db634c07a58b28116209
  - >-
    Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee <
    0edd222730a9d7ec98368aaf1d40ee2d8d862e61
  - >-
    Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee <
    a3d60ae24183eee352c8e87a0ff94c97cd87f156
  - >-
    Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee <
    49fa26b0df009dc1f420980bd71780e70615b83b
  - >-
    Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee <
    7902be374cbfc11c3435e1e87bf22195bf06a558
  - >-
    Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee <
    c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9
  - >-
    Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee <
    16b0798024c0e9117e395829ddbbe70981c79d9c
  - Linux 5.8
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T19:16:58.374900Z'
published: '2026-08-26'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:26:25.722Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80547'
references:
  - url: 'https://git.kernel.org/stable/c/3c94d4179bcc19e01b28db634c07a58b28116209'
  - url: 'https://git.kernel.org/stable/c/0edd222730a9d7ec98368aaf1d40ee2d8d862e61'
  - url: 'https://git.kernel.org/stable/c/a3d60ae24183eee352c8e87a0ff94c97cd87f156'
  - url: 'https://git.kernel.org/stable/c/49fa26b0df009dc1f420980bd71780e70615b83b'
  - url: 'https://git.kernel.org/stable/c/7902be374cbfc11c3435e1e87bf22195bf06a558'
  - url: 'https://git.kernel.org/stable/c/c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9'
  - url: 'https://git.kernel.org/stable/c/16b0798024c0e9117e395829ddbbe70981c79d9c'
tags:
  - cve.org
epss: 0.00176
epssPercentile: 0.06654
ingestedAt: '2026-10-16T19:46:24.319Z'
---

## Overview

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

s390/vfio_ccw: Implement a crw lock

Unlike the channel_program struct, which covers synchronous I/O
submissions and asynchronous interrupts, the CRW region relies
exclusively on asynchronous events coming from hardware.

Implement a lock to manage the list of those payloads, to ensure
they are read cohesively.

## Affected

- `Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee < 3c94d4179bcc19e01b28db634c07a58b28116209`
- `Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee < 0edd222730a9d7ec98368aaf1d40ee2d8d862e61`
- `Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee < a3d60ae24183eee352c8e87a0ff94c97cd87f156`
- `Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee < 49fa26b0df009dc1f420980bd71780e70615b83b`
- `Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee < 7902be374cbfc11c3435e1e87bf22195bf06a558`
- `Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee < c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9`
- `Linux >= 3f02cb2fd9d2d9e8762102886e3e4b51285797ee < 16b0798024c0e9117e395829ddbbe70981c79d9c`
- `Linux 5.8`

## Remediation

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