media: msi2500: Return queued buffers on start_streaming() failure

{
  "id": "7343b26180670512ab6e77fc778e4844e0ebf70471f28255aa5b7c01355e4cd5",
  "url": "https://osv.dev/vulnerability/CVE-2026-68222",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: msi2500: Return queued buffers on start_streaming() failure",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: msi2500: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming(). If start_streaming() returns an error without first returning those buffers via vb2_buffer_done(), vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued buffers leak. msi2500_start_streaming() had five error paths that all hit this trap and were further tangled by ret-overwriting between calls: - -ENODEV when the USB device was already disconnected - -ERESTARTSYS when mutex_lock_interruptible() was interrupted - msi2500_set_usb_adc() failure: ret was silently overwritten by the next call (msi2500_isoc_init), so the error was lost entirely - msi2500_isoc_init() failure: cleanup_queued_bufs was called, but the function then fell through to msi2500_ctrl_msg() and again masked the original error by overwriting ret - msi2500_ctrl_msg(CMD_START_STREAMING) failure: no cleanup at all, leaving isoc URBs submitted with no way for the driver to consume them Consolidate the error paths into a small goto chain. Every failure now stops the function, drains the queued-buffer list, and returns the real error code. The ctrl_msg failure path also rolls back the preceding msi2500_isoc_init() via msi2500_isoc_cleanup() before unlocking and draining. The cleanup helper takes a vb2_buffer_state argument so that the start_streaming error paths can pass VB",
    "evidence": "osv:CVE-2026-68222",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.265",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-68222",
      "aliases": [
        "CVE-2026-68222"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
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        {
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      ],
      "modified": "2026-10-28T02:30:39.622753217Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a",
        "https://git.kernel.org/stable/c/264b5380c4f8aa92dbc2983ecd2b627f1d5e0061",
        "https://git.kernel.org/stable/c/2d10eedb786a13f91d76e11320fabb0bf712519f",
        "https://git.kernel.org/stable/c/2de14ddb4fea04ca616403a6ba81c5e8099e9b9e",
        "https://git.kernel.org/stable/c/3673cb0a5711e910074d69201da9e1535c03f97a",
        "https://git.kernel.org/stable/c/7201c17786a498497bca57752883b90914d405ac",
        "https://git.kernel.org/stable/c/bab9d5a67d4db96ae8c187b92b37979911302a10",
        "https://git.kernel.org/stable/c/c74b680704baecea4620c0774de473069e0bc4e8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68222.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68222",
        "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/2026/68xxx/CVE-2026-68222.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68222",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506884,
  "published_at": "2026-08-10T12:00:42.687+00:00"
}