CVE-2026-74437 (GCVE-0-2026-74437)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:59 – Updated: 2026-08-17 05:19
VLAI
Title
media: uvcvideo: Fix deadlock if uvc_status_stop is called from async_ctrl.work
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a32d9c41bdb86e09ce731aa5fd3add89ac2103a5 , < 3659deaf7bf690510899a73906b772740d94342c (git)
Affected: a32d9c41bdb86e09ce731aa5fd3add89ac2103a5 , < 7f6c5fe1633272c926361b73d83dfc6ae01b1504 (git)
Affected: a32d9c41bdb86e09ce731aa5fd3add89ac2103a5 , < 6d27f92c54ce28cfbd2a8a479a96d6f4a781b7d2 (git)
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Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: uvcvideo: Fix deadlock if uvc_status_stop is called from async_ctrl.work\n\nIf a UVC camera has an asynchronous control, uvc_status_stop may be\ncalled from async_ctrl.work:\n\nuvc_ctrl_status_event_work()\n    uvc_ctrl_status_event()\n        uvc_ctrl_clear_handle()\n\t    uvc_pm_put()\n\t        uvc_status_put()\n\t\t    uvc_status_stop()\n\t\t        cancel_work_sync()\n\nThis will cause a deadlock, since cancel_work_sync will wait for\nuvc_ctrl_status_event_work to complete before returning.\n\nFix this by returning early from uvc_status_stop if we are currently in\nthe work function. flush_status now remains false until uvc_status_start\nis called again, ensuring that uvc_ctrl_status_event_work won\u0027t resubmit\nthe URB."
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    "dateReserved": "2026-08-15T05:44:03.897Z",
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        "descriptions": [
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: uvcvideo: Fix deadlock if uvc_status_stop is called from async_ctrl.work\n\nIf a UVC camera has an asynchronous control, uvc_status_stop may be\ncalled from async_ctrl.work:\n\nuvc_ctrl_status_event_work()\n    uvc_ctrl_status_event()\n        uvc_ctrl_clear_handle()\n\t    uvc_pm_put()\n\t        uvc_status_put()\n\t\t    uvc_status_stop()\n\t\t        cancel_work_sync()\n\nThis will cause a deadlock, since cancel_work_sync will wait for\nuvc_ctrl_status_event_work to complete before returning.\n\nFix this by returning early from uvc_status_stop if we are currently in\nthe work function. flush_status now remains false until uvc_status_start\nis called again, ensuring that uvc_ctrl_status_event_work won\u0027t resubmit\nthe URB."
          }
        ],
        "id": "CVE-2026-74437",
        "lastModified": "2026-08-17T06:19:39.390",
        "metrics": {},
        "published": "2026-08-15T06:22:45.810",
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      "cve": "CVE-2026-74437",
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      "product_status:known_affected": "184",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: media: uvcvideo: Fix deadlock if uvc_status_stop is called from async_ctrl.work",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74437.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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