CVE-2025-37812

usb: cdns3: Fix deadlock when using NCM gadget

Description

In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: Fix deadlock when using NCM gadget The cdns3 driver has the same NCM deadlock as fixed in cdnsp by commit 58f2fcb3a845 ("usb: cdnsp: Fix deadlock issue during using NCM gadget"). Under PREEMPT_RT the deadlock can be readily triggered by heavy network traffic, for example using "iperf --bidir" over NCM ethernet link. The deadlock occurs because the threaded interrupt handler gets preempted by a softirq, but both are protected by the same spinlock. Prevent deadlock by disabling softirq during threaded irq handler.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/eebfb64c624fc738b669100173344fb441c5e719
https://git.kernel.org/stable/c/59a760e4796a3cd88d8b9d7706e0a638de677751
https://git.kernel.org/stable/c/b96239582531775f2fdcb14de29bdb6870fd4c8c
https://git.kernel.org/stable/c/c27db84ed44e50ff90d9e3a2a25fae2e0a0fa015
https://git.kernel.org/stable/c/48a62deb857f0694f611949015e70ad194d97159
https://git.kernel.org/stable/c/74cd6e408a4c010e404832f0e4609d29bf1d0c41
https://git.kernel.org/stable/c/09e90a9689a4aac7a2f726dc2aa472b0b37937b7
https://git.kernel.org/stable/c/a1059896f2bfdcebcdc7153c3be2307ea319501f

Frequently Asked Questions

What is the severity of CVE-2025-37812?: CVE-2025-37812 has not yet been assigned a CVSS score.
How to fix CVE-2025-37812?: To fix CVE-2025-37812, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-37812 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-37812 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-37812?: CVE-2025-37812 affects Linux Linux, Linux Linux.

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