CVE-2026-68211 (GCVE-0-2026-68211)
Vulnerability from cvelistv5
Published
2026-08-10 12:00
Modified
2026-10-21 12:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: stm32-dcmipp: 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. dcmipp_bytecap_start_streaming() returned -EINVAL when the source subdevice could not be resolved from the media graph, before pm_runtime_resume_and_get() and media_pipeline_start() had been called. The remaining error paths already converge on the err_buffer_done label, which calls dcmipp_bytecap_all_buffers_done(..., VB2_BUF_STATE_QUEUED). Jump to that label directly: the intermediate err_pm_put / err_media_pipeline_stop 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").
References
Impacted products
Vendor Product Version
Linux Linux Version: 28e0f37722965fa150af31d82101c95fd21aef60
Version: 28e0f37722965fa150af31d82101c95fd21aef60
Version: 28e0f37722965fa150af31d82101c95fd21aef60
Version: 28e0f37722965fa150af31d82101c95fd21aef60
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-bytecap.c"
          ],
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          "programFiles": [
            "drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-bytecap.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "6.8"
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              "version": "0",
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              "status": "unaffected",
              "version": "6.12.114",
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: stm32-dcmipp: Return queued buffers on start_streaming() failure\n\nThe vb2 framework hands buffers to the driver via buf_queue() before\ncalling start_streaming().  If start_streaming() returns an error\nwithout first returning those buffers via vb2_buffer_done(),\nvb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued\nbuffers leak.\n\ndcmipp_bytecap_start_streaming() returned -EINVAL when the source\nsubdevice could not be resolved from the media graph, before\npm_runtime_resume_and_get() and media_pipeline_start() had been called.\nThe remaining error paths already converge on the err_buffer_done\nlabel, which calls dcmipp_bytecap_all_buffers_done(...,\nVB2_BUF_STATE_QUEUED).  Jump to that label directly: the intermediate\nerr_pm_put / err_media_pipeline_stop labels are skipped, which is\ncorrect because nothing they would undo has happened yet.\n\nThis mirrors the uvcvideo fix in commit 4cf3b6fd54eb (\"media: uvcvideo:\nReturn queued buffers on start_streaming() failure\")."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:43:33.155Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c1800238a60b0584b1924f11ce38ec8aba533238"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed342a86bb2f9c1b44a0fc4f6b08c14073946e4f"
        },
        {
          "url": "https://git.kernel.org/stable/c/624af2d4b5e9d3dd366538e4fb4a2a037792a7e3"
        },
        {
          "url": "https://git.kernel.org/stable/c/ffc8eec06378a340d708c889184ab3e14b57d540"
        }
      ],
      "title": "media: stm32-dcmipp: Return queued buffers on start_streaming() failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68211",
    "datePublished": "2026-08-10T12:00:30.502Z",
    "dateReserved": "2026-07-30T09:28:09.375Z",
    "dateUpdated": "2026-10-21T12:43:33.155Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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