{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-68222",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-68222"
  ],
  "published": "2026-08-10T12:08:00Z",
  "summary": "media: msi2500: Return queued buffers on start_streaming() failure",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: msi2500: 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\nmsi2500_start_streaming() had five error paths that all hit this trap\nand were further tangled by ret-overwriting between calls:\n\n  - -ENODEV when the USB device was already disconnected\n  - -ERESTARTSYS when mutex_lock_interruptible() was interrupted\n  - msi2500_set_usb_adc() failure: ret was silently overwritten by\n    the next call (msi2500_isoc_init), so the error was lost entirely\n  - msi2500_isoc_init() failure: cleanup_queued_bufs was called, but\n    the function then fell through to msi2500_ctrl_msg() and again\n    masked the original error by overwriting ret\n  - msi2500_ctrl_msg(CMD_START_STREAMING) failure: no cleanup at all,\n    leaving isoc URBs submitted with no way for the driver to consume\n    them\n\nConsolidate the error paths into a small goto chain.  Every failure\nnow stops the function, drains the queued-buffer list, and returns\nthe real error code.  The ctrl_msg failure path also rolls back the\npreceding msi2500_isoc_init() via msi2500_isoc_cleanup() before\nunlocking and draining.\n\nThe cleanup helper takes a vb2_buffer_state argument so that the\nstart_streaming error paths can pass VB2_BUF_STATE_QUEUED (as\nexpected by userspace on start_streaming failure) while stop_streaming\nkeeps its existing VB2_BUF_STATE_ERROR semantics.\n\nThis mirrors the uvcvideo fix in commit 4cf3b6fd54eb (\"media: uvcvideo:\nReturn queued buffers on start_streaming() failure\").",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.183",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-68222"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c74b680704baecea4620c0774de473069e0bc4e8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2d10eedb786a13f91d76e11320fabb0bf712519f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2de14ddb4fea04ca616403a6ba81c5e8099e9b9e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bab9d5a67d4db96ae8c187b92b37979911302a10"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/264b5380c4f8aa92dbc2983ecd2b627f1d5e0061"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3673cb0a5711e910074d69201da9e1535c03f97a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7201c17786a498497bca57752883b90914d405ac"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z"
  }
}