CVE-2026-98656 (GCVE-0-2026-98656)
Vulnerability from cvelistv5
Published
2026-10-18 15:44
Modified
2026-10-30 12:38
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: trigger: cancel reenable_work before freeing trigger iio_trigger_notify_done_atomic() defers ->reenable() into trig->reenable_work on the system workqueue, and the worker dereferences the owning trigger through container_of(). Nothing cancels this work before iio_trig_release() frees the trigger, so a worker armed by the last in-flight IRQ can outlive the free and touch freed memory. Cancel it at the top of iio_trig_release(), which every free path reaches through the device core's final put_device(). Found by an in-house static analysis tool.
References
Impacted products
Vendor Product Version
Linux Linux Version: a18aeac73c0f692ba40964f5f56e182312ae843b
Version: 9020ef659885f2622cfb386cc229b6d618362895
Version: 9020ef659885f2622cfb386cc229b6d618362895
Version: 9020ef659885f2622cfb386cc229b6d618362895
Version: 9020ef659885f2622cfb386cc229b6d618362895
Version: 9020ef659885f2622cfb386cc229b6d618362895
Version: 9020ef659885f2622cfb386cc229b6d618362895
Version: 2c5c948451d57596640b20887b06b523d376eb24
Version: 5.15.17   ≤
Version: 5.16.3   ≤
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: trigger: cancel reenable_work before freeing trigger\n\niio_trigger_notify_done_atomic() defers -\u003ereenable() into\ntrig-\u003ereenable_work on the system workqueue, and the worker dereferences\nthe owning trigger through container_of().  Nothing cancels this work\nbefore iio_trig_release() frees the trigger, so a worker armed by the\nlast in-flight IRQ can outlive the free and touch freed memory.\n\nCancel it at the top of iio_trig_release(), which every free path\nreaches through the device core\u0027s final put_device().\n\nFound by an in-house static analysis tool."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:38:28.155Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "iio: trigger: cancel reenable_work before freeing trigger",
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    "cveId": "CVE-2026-98656",
    "datePublished": "2026-10-18T15:44:07.883Z",
    "dateReserved": "2026-09-25T10:25:14.362Z",
    "dateUpdated": "2026-10-30T12:38:28.155Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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