CVE-2024-36970: wifi: iwlwifi: Use request_module_nowait
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: Use request_module_nowait
This appears to work around a deadlock regression that came in
with the LED merge in 6.9.
The deadlock happens on my system with 24 iwlwifi radios, so maybe
it something like all worker threads are busy and some work that needs
to complete cannot complete.
[also remove unnecessary "load_module" var and now-wrong comment]
Security readout for executives and security teams
Plain-English summary
This is a Linux kernel Wi-Fi driver reliability issue. The iwlwifi driver could deadlock after a 6.9 LED-related change, potentially leaving affected systems stuck or unable to complete wireless-driver work. The public record does not provide CVSS, CWE, or evidence of exploitation.
Executive priority
Treat as a targeted availability risk, not a confirmed breach indicator. Prioritize patching fleets that depend on Intel Wi-Fi or unusual multi-radio configurations, while tracking vendor kernel guidance for exact exposure.
Technical view
The fix changes iwlwifi module loading behavior to use request_module_nowait, described as a workaround for a deadlock regression introduced with the Linux 6.9 LED merge. The report notes reproduction on a system with 24 iwlwifi radios, suggesting worker-thread exhaustion or blocked work completion.
Likely exposure
Exposure appears limited to Linux systems running affected kernel builds with Intel iwlwifi wireless hardware. The source bundle flags Linux 6.9, 6.9.2, and 6.10 range data, but distribution-specific backports or fixes must be checked with the OS vendor.
Exploitation context
No source in the bundle reports active exploitation, public exploit availability, or KEV listing. The described impact is a deadlock regression, most relevant to availability and operational reliability rather than data theft or remote code execution.
Researcher notes
Evidence is sparse and kernel-focused. The record describes a resolved regression and two stable commits, but provides no CVSS, CWE, exploit narrative, or detailed affected-version matrix. Validate against upstream commits and downstream vendor patch status.
Mitigation direction
Update to a kernel containing the referenced stable iwlwifi fixes.
Check distribution security advisories for backported CVE-2024-36970 fixes.
Prioritize systems using Intel iwlwifi hardware, especially multi-radio hosts.
Avoid remaining on affected 6.9-era kernels where wireless reliability matters.
Validation and detection
Inventory Linux kernel versions across endpoints and appliances.
Identify hosts loading the iwlwifi driver or using Intel Wi-Fi hardware.
Confirm whether vendor kernels include the referenced stable commits.
Review wireless service stability logs for hangs or driver deadlock symptoms.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2024-36970 mapping review
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