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CVE Record

CVE-2024-43866: net/mlx5: Always drain health in shutdown callback

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Always drain health in shutdown callback There is no point in recovery during device shutdown. if health work started need to wait for it to avoid races and NULL pointer access. Hence, drain health WQ on shutdown callback.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's Takeunknown

Analyst readout for executives and security teams

Plain-English summary

A Linux kernel network driver bug can cause a crash during shutdown because background health work may race with device shutdown. Business impact is mainly availability for systems running affected kernels where net/mlx5 is in use. The provided sources do not report active exploitation.

Executive priority

Treat this as a maintenance-priority kernel reliability issue unless local exposure is broad or the driver supports critical workloads. Patch through normal kernel update channels, with higher urgency for production hosts using net/mlx5.

Technical view

CVE-2024-43866 is in Linux net/mlx5. During device shutdown, health recovery work could still run, creating a race and possible NULL pointer access. The kernel fix drains the health workqueue in the shutdown callback instead of allowing recovery to continue.

Likely exposure

Exposure appears limited to Linux systems on affected kernel versions where the net/mlx5 driver is present and relevant shutdown paths can execute. The source bundle lists affected Linux kernel ranges but provides no CVSS score or broader product matrix.

Exploitation context

The CVE is not listed as KEV in the provided bundle, and no cited source reports exploitation. The described condition is a shutdown-time race, which suggests reliability risk rather than clearly documented remote compromise.

Researcher notes

Evidence is sparse: no CVSS, CWE, exploit report, or detailed trigger path is provided. The available record supports a race-to-NULL-pointer issue during mlx5 shutdown, fixed by draining health work before shutdown completes.

Mitigation direction

  • Update to a Linux kernel containing the referenced stable commits.
  • Apply distribution kernel security updates when available.
  • Review Debian LTS guidance if using affected Debian releases.
  • Prioritize systems where net/mlx5 is loaded or required.
  • Schedule reboot windows needed to activate patched kernels.

Validation and detection

  • Inventory running kernel versions against the affected ranges in the CVE record.
  • Confirm whether net/mlx5 is present, loaded, or required on each host.
  • Verify the installed kernel includes the stable fix commit for its branch.
  • Check distribution advisories for packaged fixed kernel versions.
  • Monitor shutdown or device removal logs for mlx5-related crashes.
Prepared
Confidence
medium
Sources
7

Public sources used

Based on public source material and reviewed before publication.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2024-43866 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxd2aa060d40fa060e963f9a356d43481e43ba3dac, d2aa060d40fa060e963f9a356d43481e43ba3dac, d2aa060d40fa060e963f9a356d43481e43ba3dac, d2aa060d40fa060e963f9a356d43481e43ba3dac, 63d10e93df94c93bdeac87a9401696b1edadb7ed, 4.13.16unaffected
LinuxLinux4.14, 0, 6.1.113, 6.6.45, 6.10.4, 6.11affected
Weakness

CWE details

No CWE listed

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