CVE-2025-37812
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.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 5.4 | 5.4.293 |
| linux / linux_kernel | 5.5 | 5.10.237 |
| linux / linux_kernel | 5.11 | 5.15.181 |
| linux / linux_kernel | 5.16 | 6.1.136 |
| linux / linux_kernel | 6.2 | 6.6.89 |
| linux / linux_kernel | 6.7 | 6.12.26 |
| linux / linux_kernel | 6.13 | 6.14.5 |
| linux / linux_kernel | 6.15-rc1 | 6.15-rc1.x |
| linux / linux_kernel | 6.15-rc2 | 6.15-rc2.x |
| linux / linux_kernel | 6.15-rc3 | 6.15-rc3.x |
| debian / debian_linux | 11.0 | 11.0.x |
- 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
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
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