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

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Summary

CVECVE-2026-74437
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:45 UTC
Updated2026-08-15 06:22:45 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a32d9c41bdb86e09ce731aa5fd3add89ac2103a5 3659deaf7bf690510899a73906b772740d94342c git Not specified
CNA Linux Linux affected a32d9c41bdb86e09ce731aa5fd3add89ac2103a5 7f6c5fe1633272c926361b73d83dfc6ae01b1504 git Not specified
CNA Linux Linux affected a32d9c41bdb86e09ce731aa5fd3add89ac2103a5 6d27f92c54ce28cfbd2a8a479a96d6f4a781b7d2 git Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7f6c5fe1633272c926361b73d83dfc6ae01b1504 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6d27f92c54ce28cfbd2a8a479a96d6f4a781b7d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3659deaf7bf690510899a73906b772740d94342c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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