---
id: CVE-2024-27437
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vfio/pci: Disable auto-enable of exclusive INTx IRQ

  Currently for devices requiring masking at the irqchip for INTx, ie.
  devices without DisINTx support, the IRQ is en…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vfio/pci: Disable auto-enable of exclusive INTx IRQ

  Currently for devices requiring masking at the irqchip for INTx, ie.
  devices without DisINTx support, the IRQ is en…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 3.6, < 6.1.84'
  - 'linux_kernel >= 6.2, < 6.6.24'
  - 'linux_kernel >= 6.7, < 6.7.12'
  - 'linux_kernel >= 6.8, < 6.8.3'
  - 'linux_kernel >= 6.8.4, <= 6.8.12'
  - debian_linux = 10.0
patched:
  - linux_kernel 6.8.3
published: '2024-04-05'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:17:41.450'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-27437'
references:
  - url: 'https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.0024
epssPercentile: 0.15019
ingestedAt: '2026-10-15T03:30:12.649Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-04-05T13:39:05.639772Z'
---

## Overview

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

vfio/pci: Disable auto-enable of exclusive INTx IRQ

Currently for devices requiring masking at the irqchip for INTx, ie.
devices without DisINTx support, the IRQ is enabled in request_irq()
and subsequently disabled as necessary to align with the masked status
flag.  This presents a window where the interrupt could fire between
these events, resulting in the IRQ incrementing the disable depth twice.
This would be unrecoverable for a user since the masked flag prevents
nested enables through vfio.

Instead, invert the logic using IRQF_NO_AUTOEN such that exclusive INTx
is never auto-enabled, then unmask as required.

## Affected

- `linux_kernel >= 3.6, < 6.1.84`
- `linux_kernel >= 6.2, < 6.6.24`
- `linux_kernel >= 6.7, < 6.7.12`
- `linux_kernel >= 6.8, < 6.8.3`
- `linux_kernel >= 6.8.4, <= 6.8.12`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.8.3`