Linux Kernel
CVE-2025-68781
Vulnerability Assessment
| Exploit ScenarioDerived | An attacker could exploit this flaw, use-after-free when the work function fsl_otg_event() access. |
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Alert meAnalysisAIv1 – Mar 12, 2026
In the Linux kernel, the following vulnerability has been resolved:
usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal
The delayed work item otg_event is initialized in fsl_otg_conf() and scheduled under two conditions: 1.
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In the Linux kernel, the following vulnerability has been resolved:
usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal
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Technical ContextAI · show details
In the Linux kernel, the following vulnerability has been resolved:
usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal
The delayed work item otg_event is initialized in fsl_otg_conf() and scheduled under two conditions:
- When a host controller binds to the OTG controller.
- When the USB ID pin state changes (cable insertion/removal).
A race condition occurs when the device is removed via fsl_otg_remove(): the fsl_otg instance may be freed while the delayed work is
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DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal
The delayed work item otg_event is initialized in fsl_otg_conf() and scheduled under two conditions:
- When a host controller binds to the OTG controller.
- When the USB ID pin state changes (cable insertion/removal).
A race condition occurs when the device is removed via fsl_otg_remove(): the fsl_otg instance may be freed while the delayed work is still pending or executing. This leads to use-after-free when the work function fsl_otg_event() accesses the already freed memory.
The problematic scenario:
(detach thread) | (delayed work) fsl_otg_remove() | kfree(fsl_otg_dev) //FREE| fsl_otg_event()
| og = container_of(...) //USE | og-> //USE Fix this by calling disable_delayed_work_sync() in fsl_otg_remove() before deallocating the fsl_otg structure. This ensures the delayed work is properly canceled and completes execution prior to memory deallocation.
This bug was identified through static analysis.
Threat Intelligence Overview
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Attack Technique
Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.
Race conditions occur when multiple concurrent requests exploit the brief time gap between checking a condition and acting upon it (TOCTOU - Time of Check, Time of Use).
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