{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  media: rtl2832_sdr: use vb2_video_unregister_device() on remove to fix DMA leak  rtl2832_sdr_remove() runs on USB disconnect and clears dev-\u003eudev to NULL before any pending streaming teardown has run. When user space later closes its file descriptor, vb2 calls rtl2832_sdr_stop_streaming() which in turn calls rtl2832_sdr_free_stream_bufs(). That helper releases each coherent buffer with:      usb_free_coherent(dev-\u003eudev, dev-\u003ebuf_size,                       dev-\u003ebuf_list[dev-\u003ebuf_num],                       dev-\u003edma_addr[dev-\u003ebuf_num]);  usb_free_coherent() returns immediately when its dev argument is NULL, so every DMA stream buffer that was live at disconnect is silently leaked. The URBs allocated in rtl2832_sdr_alloc_urbs() outlive the device for the same reason.  The rtl2832_sdr driver uses vb2_fop_release() in its file_operations, so replace video_unregister_device(\u0026dev-\u003evdev) with vb2_video_unregister_device(\u0026dev-\u003evdev) and move it before clearing dev-\u003eudev. vb2_video_unregister_device() releases the vb2 queue, which synchronously runs rtl2832_sdr_stop_streaming() if streaming is active, so URBs and coherent DMA stream buffers are freed while dev-\u003eudev is still valid.  vb2_video_unregister_device() locks vdev-\u003equeue-\u003elock (vb_queue_lock) internally, and stop_streaming() locks v4l2_lock, so the previous outer mutex_lock(\u0026dev-\u003evb_queue_lock) / mutex_lock(\u0026dev-\u003ev4l2_lock) pair around the unregister sequence would self-deadlock and has been removed. A short v4l2_lock critical section around dev-\u003eudev = NULL remains so any ioctl path that still holds the file descriptor sees coherent state.  Issue identified by automated review of the INV-003 series at https://sashiko.dev/",
  "id": "DEBIAN-CVE-2026-89881",
  "modified": "2026-09-17T04:47:35.065771173Z",
  "published": "2026-09-16T11:16:56.503Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89881"
    }
  ],
  "upstream": [
    "CVE-2026-89881"
  ]
}