CVE-2026-68175 (GCVE-0-2026-68175)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-08-19 16:30
VLAI
Title
tracing: Fix resource leak on mmiotrace trace_pipe close
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix resource leak on mmiotrace trace_pipe close The mmiotrace tracer was added May 12th 2008. At that time, resources created in pipe_open() could not be freed because there was not pipe_close function pointer of the tracer. The pipe_close function pointer was added in December 7th, 2009, but the mmiotrace tracer was not updated. mmio_pipe_open() allocates a header_iter and takes a pci_dev reference when trace_pipe is opened. mmio_close() frees them, but it was only wired to the tracer's .close callback. tracing_release_pipe() invokes .pipe_close, not .close, when the trace_pipe file is released. As a result, closing trace_pipe with the mmiotrace tracer active leaked the header_iter allocation and left a stale pci_dev reference. Set .pipe_close to mmio_close, matching how function_graph wires both callbacks to the same handler. Note, if the trace_pipe is read to completion, it will clean up the resources, but if one were to run: # head -n 1 /sys/kernel/tracing/trace_pipe VERSION 20070824 Over and over again, it would trigger a massive leak.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c521efd1700a8c0f7ce26f011f5eaecca17fabfa , < 7871128ea41217fa6a58bbbcb44cb0d2e9e60966 (git)
Affected: c521efd1700a8c0f7ce26f011f5eaecca17fabfa , < 1d0b59e2b203c02149d8f63607329debe36b3ec5 (git)
Affected: c521efd1700a8c0f7ce26f011f5eaecca17fabfa , < 581ac13e12e77d6c64f8719083bdf95209308919 (git)
Affected: c521efd1700a8c0f7ce26f011f5eaecca17fabfa , < f9e6dfe341fb31c95b9655eb6b1db8b3ae090817 (git)
Affected: c521efd1700a8c0f7ce26f011f5eaecca17fabfa , < 594e1cf3f736779a535873fd5988162d827bfe4f (git)
Affected: c521efd1700a8c0f7ce26f011f5eaecca17fabfa , < cf5a82bef623b969a609f2b7e392d06dbae34aa6 (git)
Affected: c521efd1700a8c0f7ce26f011f5eaecca17fabfa , < cb459fec4f7b13caf646101ff076e94ef38434d8 (git)
Affected: c521efd1700a8c0f7ce26f011f5eaecca17fabfa , < c1d87e724ae55e781b7cc7ccafb34d9e668582b2 (git)
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Linux Linux Affected: 2.6.33
Unaffected: 0 , < 2.6.33 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "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\u0027s .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."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:30:39.826Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/c1d87e724ae55e781b7cc7ccafb34d9e668582b2"
        }
      ],
      "title": "tracing: Fix resource leak on mmiotrace trace_pipe close",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68175",
    "datePublished": "2026-08-10T11:59:45.965Z",
    "dateReserved": "2026-07-30T09:28:09.372Z",
    "dateUpdated": "2026-08-19T16:30:39.826Z",
    "state": "PUBLISHED"
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      "date": "2026-08-20",
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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\u0027s .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\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/trace/trace_mmiotrace.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c521efd1700a8c0f7ce26f011f5eaecca17fabfa\",\"lessThan\":\"7871128ea41217fa6a58bbbcb44cb0d2e9e60966\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c521efd1700a8c0f7ce26f011f5eaecca17fabfa\",\"lessThan\":\"1d0b59e2b203c02149d8f63607329debe36b3ec5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c521efd1700a8c0f7ce26f011f5eaecca17fabfa\",\"lessThan\":\"581ac13e12e77d6c64f8719083bdf95209308919\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c521efd1700a8c0f7ce26f011f5eaecca17fabfa\",\"lessThan\":\"f9e6dfe341fb31c95b9655eb6b1db8b3ae090817\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c521efd1700a8c0f7ce26f011f5eaecca17fabfa\",\"lessThan\":\"594e1cf3f736779a535873fd5988162d827bfe4f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c521efd1700a8c0f7ce26f011f5eaecca17fabfa\",\"lessThan\":\"cf5a82bef623b969a609f2b7e392d06dbae34aa6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c521efd1700a8c0f7ce26f011f5eaecca17fabfa\",\"lessThan\":\"cb459fec4f7b13caf646101ff076e94ef38434d8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c521efd1700a8c0f7ce26f011f5eaecca17fabfa\",\"lessThan\":\"c1d87e724ae55e781b7cc7ccafb34d9e668582b2\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/trace/trace_mmiotrace.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.33\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.33\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1d0b59e2b203c02149d8f63607329debe36b3ec5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/581ac13e12e77d6c64f8719083bdf95209308919\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/594e1cf3f736779a535873fd5988162d827bfe4f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7871128ea41217fa6a58bbbcb44cb0d2e9e60966\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c1d87e724ae55e781b7cc7ccafb34d9e668582b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cb459fec4f7b13caf646101ff076e94ef38434d8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf5a82bef623b969a609f2b7e392d06dbae34aa6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f9e6dfe341fb31c95b9655eb6b1db8b3ae090817\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-13T22:53:29+00:00",
      "cve": "CVE-2026-68175",
      "id": "CVE-2026-68175",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "261",
      "product_status:known_not_affected": "15",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tracing: Fix resource leak on mmiotrace trace_pipe close",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68175.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-13T16:23:38Z",
      "cve": "CVE-2026-68175",
      "id": "CVE-2026-68175",
      "initial_release_date": "2026-08-13T16:23:38Z",
      "product_status:known_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68175",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68175.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.