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

{
  "id": "f0b6e5cdb8467da8c0ab75c09fb6288b4e32ea8669fbe10d4f94f8fc68e1e662",
  "url": "https://osv.dev/vulnerability/CVE-2026-74437",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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.",
    "evidence": "osv:CVE-2026-74437",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.40",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-74437",
      "aliases": [
        "CVE-2026-74437"
      ],
      "affected": [
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              "type": "GIT",
              "events": [
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                {
                  "fixed": "3659deaf7bf690510899a73906b772740d94342c"
                },
                {
                  "fixed": "7f6c5fe1633272c926361b73d83dfc6ae01b1504"
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                  "fixed": "6d27f92c54ce28cfbd2a8a479a96d6f4a781b7d2"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74437.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.18.40"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74437.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.805295682Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3659deaf7bf690510899a73906b772740d94342c",
        "https://git.kernel.org/stable/c/6d27f92c54ce28cfbd2a8a479a96d6f4a781b7d2",
        "https://git.kernel.org/stable/c/7f6c5fe1633272c926361b73d83dfc6ae01b1504",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74437.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74437",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74437.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74437",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 505356,
  "published_at": "2026-08-15T05:59:35.297+00:00"
}