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CVE-2026-16148— Kernel panic in the it82xx2 USB device controller driver via re-initialization of a busy delayable work item

Quick assessment

Affected
zephyrproject zephyr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 中的 ITE it82xx2 USB 设备控制器驱动中， （即驱动的 操作）内部通过 初始化其总线挂起检测的工作项。当 USB 总线处于活动状态时，该工作项实际上会被持续调度：中断处理程序会在每个 SOF 帧后重新调度该工作项，而 也会重新调度自身，因此其超时节点通常挂在内核超时链表或工作队列的待处理队列中。 （位于 ）会无条件地覆盖整个 结构体，包括其超时机制和队列链接，且没有进行“忙碌”检查。由于 并未取消该工作项，一次普通的“禁用后再启用”周期会再次执行 （ 仅拒绝重复启用，但不拒绝禁用后的重新启用），从

CVSS 4.6 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-16148

Vulnerability Information
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Vulnerability Title
Kernel panic in the it82xx2 USB device controller driver via re-initialization of a busy delayable work item
Source: CVE Program / CVE List V5
Vulnerability Description
The ITE it82xx2 USB device-controller driver initialized its bus-suspend detection work with k_work_init_delayable(&priv->suspended_work, suspended_handler) inside it82xx2_enable() (the driver's .enable op) in drivers/usb/udc/udc_it82xx2.c. This work item is scheduled essentially continuously while the USB bus is active: the interrupt handler reschedules it on every SOF frame and suspended_handler() reschedules itself, so its timeout node is normally linked in the kernel timeout list / a workqueue pending queue. k_work_init_delayable() (kernel/work.c) unconditionally overwrites the entire k_work_delayable structure, including its timeout and queue linkage, with no busy check. Because it82xx2_disable() does not cancel the work, a normal disable-then-enable cycle re-runs api->enable() (udc_enable() only rejects a redundant enable, not a re-enable after disable) and re-initializes the still-pending work in place, corrupting the kernel timeout/workqueue linked lists and causing a kernel panic. An external USB host — for example a host performing USB DFU detach (dfu-util --detach) or forcing repeated attach/reset/re-enumeration — drives the udc_disable()/udc_enable() transitions and controls suspend/resume timing, so it can arrange for the suspend work to be pending across a re-enable. This yields an unauthenticated denial of service (kernel panic) reachable across the USB boundary from a removable, physically-connected host, with no confidentiality or integrity impact demonstrated. The fix moves the k_work_init_delayable() call into the one-time preinit function so the work is initialized exactly once, eliminating the re-initialization of an in-use item.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在生命周期错误阶段对资源进行操作
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
zephyrproject zephyr 3.7.0 ~ 4.4.2 -

II. Public POCs for CVE-2026-16148

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III. Intelligence Information for CVE-2026-16148

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Patches & Fixes for CVE-2026-16148 (1)

Vendor Advisories for CVE-2026-16148 (1)

Same Patch Batch · zephyrproject · 2026-09-14 · 5 CVEs total

CVE-2026-16147 6.8 MEDIUM it82xx2 USB device controller submits incomplete OUT transfer buffers, causing use-after-f
CVE-2026-15893 6.5 MEDIUM Zephyr IPv6 Neighbor Discovery zero reachable time from crafted Router Advertisement cause
CVE-2026-15924 5.9 MEDIUM Use-after-free / double-free from unsynchronized concurrent access to the TLS client sessi
CVE-2026-15923 4.6 MEDIUM Infinite loop denial of service in Zephyr SDIO byte-I/O from a card-supplied zero max_blk_

IV. Related Vulnerabilities

Same product: zephyr
Same vendor: zephyrproject
Same weakness: CWE-666

V. Comments for CVE-2026-16148

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