Updated: 2025-11-19 04:40:32.629656
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.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | MEDIUM | 5.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | kernel | 5.14.0 | 5.5 | MEDIUM | Needs Triage | 2025-11-25 02:00:25 | ||
| Oracle Linux 7 ELS | kernel-uek | 5.4.17 | 5.5 | MEDIUM | Released | CLSA-2025:1757963029 | 2025-09-16 11:20:46 | |
| TuxCare 9.6 ESU | kernel | 5.14.0 | 5.5 | MEDIUM | Ignored | 2025-12-03 00:22:43 | Deprioritize: the bug only manifests on systems that 1) use the Cadence USB3 (cdns3) controller in U... | |
| Ubuntu 20.04 ELS | linux | 5.4.0 | 5.5 | MEDIUM | Needs Triage | 2025-11-24 16:23:59 |