CVE-2024-26814

Local kernel crash via absent eventfd trigger

Published Apr 5, 2024 · Updated May 11, 2026

NULL-pointer dereference in the vfio-fsl-mc driver allows local users to crash affected Linux systems through a VFIO loopback test ioctl. The test path calls the interrupt handler when vfio_fsl_mc_irq.trigger is NULL after initialization or after its eventfd is set to -1, causing the handler to dereference an absent eventfd context. Low-privileged local access to the VFIO device and its test ioctl is required, and successful exploitation interrupts the entire host rather than exposing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereference in the vfio-fsl-mc driver allows local users to crash affected Linux systems through a VFIO loopback test ioctl. The test path calls the interrupt handler when vfio_fsl_mc_irq.trigger is NULL after initialization or after its eventfd is set to -1, causing the handler to dereference an absent eventfd context. Low-privileged local access to the VFIO device and its test ioctl is required, and successful exploitation interrupts the entire host rather than exposing or modifying data.

The record

CVE
CVE-2024-26814
Published
Apr 5, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.10
  2. Affected versionversion=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <083e750c9f5f4c3bf61161330fb84d7c8e8bb417
  3. Affected versionversion=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <250219c6a556f8c69c5910fca05a59037e24147d
  4. Affected versionversion=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <6ec0d88166dac43f29e96801c0927d514f17add9
  5. Affected versionversion=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <7447d911af699a15f8d050dfcb7c680a86f87012
  6. Affected versionversion=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <a563fc18583ca4f42e2fdd0c70c7c618288e7ede
  7. Affected versionversion=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <de87511fb0404d23b6da5f4660383b6ed095e28d
  8. Affected versionversion=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <ee0bd4ad780dfbb60355b99f25063357ab488267

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <083e750c9f5f4c3bf61161330fb84d7c8e8bb417; version=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <250219c6a556f8c69c5910fca05a59037e24147d; version=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <6ec0d88166dac43f29e96801c0927d514f17add9; version=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <7447d911af699a15f8d050dfcb7c680a86f87012; version=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <a563fc18583ca4f42e2fdd0c70c7c618288e7ede; version=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <de87511fb0404d23b6da5f4660383b6ed095e28d; version=cc0ee20bd96971c10eba9a83ecf1c0733078a083 <ee0bd4ad780dfbb60355b99f25063357ab488267

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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