CVE-2026-98669 (GCVE-0-2026-98669)
Vulnerability from cvelistv5
Published
2026-10-18 15:45
Modified
2026-10-21 12:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: buffer: serialize buffer teardown with mode claims Buffer-mode claims hold mlock to guarantee that the device remains in buffer mode until the claim is released. Normal buffer updates take info_exist_lock followed by mlock in iio_update_buffers(). However, iio_device_unregister() disables and deactivates all buffers without taking mlock. This can invalidate buffer state, including active_scan_mask, while a buffer-mode claim is held. Take mlock in iio_disable_all_buffers() so that unregister honors the mode-claim lifetime guarantee. The info_exist_lock -> mlock ordering matches iio_update_buffers().
References
Impacted products
Vendor Product Version
Linux Linux Version: 0a8565425afd8ba0e1a0ea73e21da119ee6dacea
Version: 0a8565425afd8ba0e1a0ea73e21da119ee6dacea
Version: 0a8565425afd8ba0e1a0ea73e21da119ee6dacea
Version: 0a8565425afd8ba0e1a0ea73e21da119ee6dacea
Version: 0a8565425afd8ba0e1a0ea73e21da119ee6dacea
Version: a9c471892d75847671a246619c2148578f22bbc6
Version: 7bca0af538a49dacb1470f233be0676bdc09605b
Version: 5.15.137   ≤
Version: 6.1.60   ≤
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: buffer: serialize buffer teardown with mode claims\n\nBuffer-mode claims hold mlock to guarantee that the device remains in\nbuffer mode until the claim is released. Normal buffer updates take\ninfo_exist_lock followed by mlock in iio_update_buffers().\n\nHowever, iio_device_unregister() disables and deactivates all buffers\nwithout taking mlock. This can invalidate buffer state, including\nactive_scan_mask, while a buffer-mode claim is held.\n\nTake mlock in iio_disable_all_buffers() so that unregister honors the\nmode-claim lifetime guarantee. The info_exist_lock -\u003e mlock ordering\nmatches iio_update_buffers()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:55:33.672Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6a728408ff522b749c2a3c7e68f44e861fa0dbfb"
        },
        {
          "url": "https://git.kernel.org/stable/c/89f3852a28fcf7bab599280cb082baa0675536db"
        },
        {
          "url": "https://git.kernel.org/stable/c/b466db9e68b4741af85f6c017e2bb0a2f025053f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e63188d77e10c0951bf67da6c295f768fd1abf4b"
        },
        {
          "url": "https://git.kernel.org/stable/c/84bb0fc46ccf6a545b8fdf57cda83770186ed8dd"
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      ],
      "title": "iio: buffer: serialize buffer teardown with mode claims",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98669",
    "datePublished": "2026-10-18T15:45:05.836Z",
    "dateReserved": "2026-09-25T10:25:14.363Z",
    "dateUpdated": "2026-10-21T12:55:33.672Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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