CVE-2026-10647— Zephyr 竞争条件问题漏洞
一分钟漏洞结论
影响对象
zephyrproject zephyr
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Zephyr是Zephyr组织开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr 4.1.0版本至4.5.0之前版本存在竞争条件问题漏洞，该漏洞源于USB CDC-NCM设备类在以太网发送回调函数cdc_ncm_send()中忽略了usbd_ep_enqueue()的返回值，当入队失败时仍持有接口TX锁阻塞在完成信号量上，导致共享网络流量TX线程永久死锁并停止传输，直至系统重启。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| zephyrproject | zephyr | 4.0.0< 4.5.0 |
affected |
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一、 漏洞 CVE-2026-10647 基础信息
漏洞信息
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Vulnerability Title
Deadlock denial of service in USB CDC-NCM device class on TX enqueue failure
来源: CVE Program / CVE List V5
Vulnerability Description
The USB CDC-NCM device class (subsys/usb/device_next/class/usbd_cdc_ncm.c) ignores the return value of usbd_ep_enqueue() in its ethernet transmit callback cdc_ncm_send(). When the enqueue fails, the function still calls k_sem_take(&data->sync_sem, K_FOREVER), blocking on a completion semaphore that is only ever signaled from the bulk-IN transfer-completion callback. Because nothing was enqueued, that callback never fires and the calling thread — a shared network traffic-class TX thread — deadlocks permanently while holding the interface TX lock, halting transmission until reboot (and leaking the transmit buffer).
The enqueue fails under conditions controlled by the attached USB host: usbd_ep_enqueue() returns -EPERM whenever the bus is suspended (a standard, persistent host operation), and the underlying udc_ep_enqueue() returns -EPERM/-ENODEV on disconnect, bus reset, or endpoint disable. The cdc_ncm_send() guard only checks the DATA_IFACE_ENABLED and IFACE_UP flags, not the suspended state, so a packet transmitted while the host holds the bus suspended reaches the failing enqueue and deadlocks the TX path.
The realistic trigger is a bus suspend that occurs while the exported network interface is active and has traffic to send — host sleep, USB selective/auto-suspend, or hub power management — after which any device-originated packet deadlocks the path, recoverable only by reboot. The impact is a persistent loss of the virtual network connection between the host's NCM interface and the Zephyr device; because the deadlocked thread is a shared traffic-class TX thread, egress on other network interfaces can stall as well. There is no memory corruption or information disclosure.
The defect was introduced with the CDC-NCM driver and shipped in releases through v4.4.0; it is fixed by checking the usbd_ep_enqueue() return value and freeing the buffer before the blocking wait.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
死锁
来源: CVE Program / CVE List V5
Vulnerability Title
Zephyr 竞争条件问题漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Zephyr是Zephyr组织开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr 4.1.0版本至4.5.0之前版本存在竞争条件问题漏洞，该漏洞源于USB CDC-NCM设备类在以太网发送回调函数cdc_ncm_send()中忽略了usbd_ep_enqueue()的返回值，当入队失败时仍持有接口TX锁阻塞在完成信号量上，导致共享网络流量TX线程永久死锁并停止传输，直至系统重启。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| zephyrproject | zephyr | 4.0.0 ~ 4.5.0 | - |
|
二、漏洞 CVE-2026-10647 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-10647 补丁与修复 (1)
CVE-2026-10647 厂商安全公告 (1)
同批安全公告 · zephyrproject · 2026-06-29 · 共 4 条
| CVE-2026-7656 | 8.1 HIGH | Zephyr 授权问题漏洞 |
| CVE-2026-8023 | 7.5 HIGH | Zephyr 路径遍历漏洞 |
| CVE-2026-10648 | 6.2 MEDIUM | Zephyr 异常处理不当漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-10647
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