CVE-2026-74437

Summary

In the Linux kernel, the following vulnerability has been resolved:

media: uvcvideo: Fix deadlock if uvc_status_stop is called from async_ctrl.work

If a UVC camera has an asynchronous control, uvc_status_stop may be called from async_ctrl.work:

uvc_ctrl_status_event_work() uvc_ctrl_status_event() uvc_ctrl_clear_handle() uvc_pm_put() uvc_status_put() uvc_status_stop() cancel_work_sync()

This will cause a deadlock, since cancel_work_sync will wait for uvc_ctrl_status_event_work to complete before returning.

Fix this by returning early from uvc_status_stop if we are currently in the work function. flush_status now remains false until uvc_status_start is called again, ensuring that uvc_ctrl_status_event_work won't resubmit the URB.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/3659deaf7bf690510899a73906b772740d94342c
• https://git.kernel.org/stable/c/7f6c5fe1633272c926361b73d83dfc6ae01b1504
• https://git.kernel.org/stable/c/6d27f92c54ce28cfbd2a8a479a96d6f4a781b7d2

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