{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-68175",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-68175"
  ],
  "published": "2026-08-10T12:08:00Z",
  "summary": "tracing: Fix resource leak on mmiotrace trace_pipe close",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix resource leak on mmiotrace trace_pipe close\n\nThe mmiotrace tracer was added May 12th 2008. At that time, resources\ncreated in pipe_open() could not be freed because there was not\npipe_close function pointer of the tracer. The pipe_close function pointer\nwas added in December 7th, 2009, but the mmiotrace tracer was not updated.\n\nmmio_pipe_open() allocates a header_iter and takes a pci_dev reference\nwhen trace_pipe is opened. mmio_close() frees them, but it was only\nwired to the tracer's .close callback.\n\ntracing_release_pipe() invokes .pipe_close, not .close, when the\ntrace_pipe file is released. As a result, closing trace_pipe with the\nmmiotrace tracer active leaked the header_iter allocation and left a\nstale pci_dev reference.\n\nSet .pipe_close to mmio_close, matching how function_graph wires both\ncallbacks to the same handler.\n\nNote, if the trace_pipe is read to completion, it will clean up the\nresources, but if one were to run:\n\n  # head -n 1 /sys/kernel/tracing/trace_pipe\n VERSION 20070824\n\nOver and over again, it would trigger a massive leak.",
  "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-2026-68175"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7871128ea41217fa6a58bbbcb44cb0d2e9e60966"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d0b59e2b203c02149d8f63607329debe36b3ec5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/581ac13e12e77d6c64f8719083bdf95209308919"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f9e6dfe341fb31c95b9655eb6b1db8b3ae090817"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/594e1cf3f736779a535873fd5988162d827bfe4f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cf5a82bef623b969a609f2b7e392d06dbae34aa6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cb459fec4f7b13caf646101ff076e94ef38434d8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c1d87e724ae55e781b7cc7ccafb34d9e668582b2"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z"
  }
}