media: sun4i-csi: Return queued buffers on start_streaming() failure

{
  "id": "5042e61ad0fb1b820968d97e6b2af50c3c67cb9217bb1d7a787c389879f6a8e3",
  "url": "https://osv.dev/vulnerability/CVE-2026-68209",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: sun4i-csi: Return queued buffers on start_streaming() failure",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: sun4i-csi: 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. sun4i_csi_start_streaming() returned -EINVAL when no matching CSI format could be found, before any setup (scratch buffer allocation, pipeline start) had been performed. The remaining error paths already converge on the err_clear_dma_queue label, which calls return_all_buffers(..., VB2_BUF_STATE_QUEUED) under csi->qlock. Jump to that label directly: the intermediate err_disable_device / err_disable_pipeline / err_free_scratch_buffer labels are skipped, which is correct because nothing they would undo has happened yet. This mirrors the uvcvideo fix in commit 4cf3b6fd54eb (\"media: uvcvideo: Return queued buffers on start_streaming() failure\").",
    "evidence": "osv:CVE-2026-68209",
    "products": [
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        "prerequisites": [],
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    "severity": "high",
    "structured": {
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          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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      "modified": "2026-10-28T02:30:29.362745266Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/29fce7bcb3b959f6d4fdcdff7d26330152fdf98d",
        "https://git.kernel.org/stable/c/3c0bd793b0083fd4639ba7f60d1e7db8c8ac459a",
        "https://git.kernel.org/stable/c/4872161e6fbe4e1783daea8bff79caddfae0fb82",
        "https://git.kernel.org/stable/c/668face37fdb6b6900645dc8777195498541c9a7",
        "https://git.kernel.org/stable/c/7c2c30e282745a83d332c3cf92d1c0bcc491ac54",
        "https://git.kernel.org/stable/c/a8abecc638a7feb20b78fabd563b05e30c071331",
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        "https://git.kernel.org/stable/c/bbba3e260a62810a717b4442a3bb96d0ec0f6309",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68209.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68209",
        "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-2026-68209.json"
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        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 495979,
  "published_at": "2026-08-10T12:00:28.245+00:00"
}