CVE-2024-36970

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]

Weakness

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Affected Software

Extended Description

Locking is a type of synchronization behavior that ensures that multiple independently-operating processes or threads do not interfere with each other when accessing the same resource. All processes/threads are expected to follow the same steps for locking. If these steps are not followed precisely - or if no locking is done at all - then another process/thread could modify the shared resource in a way that is not visible or predictable to the original process. This can lead to data or memory corruption, denial of service, etc.

Potential Mitigations

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/25.html
• https://cwe.mitre.org/data/definitions/26.html
• https://cwe.mitre.org/data/definitions/27.html

References

• https://git.kernel.org/stable/c/3d913719df14c28c4d3819e7e6d150760222bda4
• https://git.kernel.org/stable/c/d20013259539e2fde2deeac85354851097afdf9e
• https://git.kernel.org/stable/c/3d913719df14c28c4d3819e7e6d150760222bda4
• https://git.kernel.org/stable/c/d20013259539e2fde2deeac85354851097afdf9e