CVE-2025-37812: debian linux — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-667 CWE-667

Affected Products

Vendor	Product	Versions
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	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

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

Other References

https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-37812? +

CVE-2025-37812 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-37812? +

CVE-2025-37812 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-37812? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-37812