CVE-2024-43866

Kernel crash via undrained mlx5 health work

Published Aug 20, 2024 · Updated May 23, 2026

NULL pointer dereference in the Linux kernel mlx5 driver allows local users to crash a system during device shutdown. The shutdown callback fails to drain queued health work before fast-unload teardown, allowing asynchronous recovery to race teardown and access a NULL pointer. Exploitation requires local access and an affected mlx5 device; the bounded consequence is a kernel crash and service interruption.

CVSS severity4.7
Medium
EPSS probability0.16%
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 Linux kernel mlx5 driver allows local users to crash a system during device shutdown. The shutdown callback fails to drain queued health work before fast-unload teardown, allowing asynchronous recovery to race teardown and access a NULL pointer. Exploitation requires local access and an affected mlx5 device; the bounded consequence is a kernel crash and service interruption.

The record

CVE
CVE-2024-43866
Published
Aug 20, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, CWE-362, T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=4.13.16 <4.14
  2. Affected versionversion=4.14
  3. Affected versionversion=63d10e93df94c93bdeac87a9401696b1edadb7ed
  4. Affected versionversion=d2aa060d40fa060e963f9a356d43481e43ba3dac <1b75da22ed1e6171e261bc9265370162553d5393
  5. Affected versionversion=d2aa060d40fa060e963f9a356d43481e43ba3dac <5005e2e159b300c1b8c6820a1e13a62eb0127b9b
  6. Affected versionversion=d2aa060d40fa060e963f9a356d43481e43ba3dac <6048dec754554a1303d632be6042d3feb3295285
  7. Affected versionversion=d2aa060d40fa060e963f9a356d43481e43ba3dac <6b6c2ebd83f2bf97e8f221479372aaca97a4a9b2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.13.16 <4.14; version=4.14; version=63d10e93df94c93bdeac87a9401696b1edadb7ed; version=d2aa060d40fa060e963f9a356d43481e43ba3dac <1b75da22ed1e6171e261bc9265370162553d5393; version=d2aa060d40fa060e963f9a356d43481e43ba3dac <5005e2e159b300c1b8c6820a1e13a62eb0127b9b; version=d2aa060d40fa060e963f9a356d43481e43ba3dac <6048dec754554a1303d632be6042d3feb3295285; version=d2aa060d40fa060e963f9a356d43481e43ba3dac <6b6c2ebd83f2bf97e8f221479372aaca97a4a9b2

Published CVSS scores

4.4Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.7NIST NVDCVSS:3.1/AV:L/AC:H/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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1529System Shutdown/Reboot

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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