CVE-2025-37812 Information

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 (�sb: 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.

Reference

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