| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: 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. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37812 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 5.4.293 with commit eebfb64c624fc738b669100173344fb441c5e719 |
| Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 5.10.237 with commit 59a760e4796a3cd88d8b9d7706e0a638de677751 |
| Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 5.15.181 with commit b96239582531775f2fdcb14de29bdb6870fd4c8c |
| Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 6.1.136 with commit c27db84ed44e50ff90d9e3a2a25fae2e0a0fa015 |
| Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 6.6.89 with commit 48a62deb857f0694f611949015e70ad194d97159 |
| Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 6.12.26 with commit 74cd6e408a4c010e404832f0e4609d29bf1d0c41 |
| Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 6.14.5 with commit 09e90a9689a4aac7a2f726dc2aa472b0b37937b7 |
| Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 6.15 with commit a1059896f2bfdcebcdc7153c3be2307ea319501f |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-37812 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/usb/cdns3/cdns3-gadget.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| 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 |
