CVE-2026-97582 (GCVE-0-2026-97582)
Vulnerability from cvelistv5
Published
2026-09-25 10:22
Modified
2026-10-30 12:37
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (gpio-fan) Fix use-after-free in alarm work fan_alarm_irq_handler() queues fan_data->alarm_work, but nothing cancels it. fan_alarm_notify() dereferences fan_data and its hwmon device. On unbind, devres frees the interrupt, which only waits for the handler itself, and then releases the hwmon device and fan_data, so a pending fan_alarm_notify() can run after those frees. Replace INIT_WORK() with devm_work_autocancel(), registered before devm_request_irq(). The devres cleanup then frees the interrupt first, so no new work can be queued, and cancels the work while fan_data and the hwmon device are still alive. This issue was found by an in-house static analysis tool.
References
Impacted products
Vendor Product Version
Linux Linux Version: d6fe1360f42e86262153927986dea6502daff703
Version: d6fe1360f42e86262153927986dea6502daff703
Version: d6fe1360f42e86262153927986dea6502daff703
Version: d6fe1360f42e86262153927986dea6502daff703
Version: d6fe1360f42e86262153927986dea6502daff703
Version: d6fe1360f42e86262153927986dea6502daff703
Version: d6fe1360f42e86262153927986dea6502daff703
Version: d6fe1360f42e86262153927986dea6502daff703
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/gpio-fan.c"
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              "lessThanOrEqual": "5.15.*",
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      ],
      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (gpio-fan) Fix use-after-free in alarm work\n\nfan_alarm_irq_handler() queues fan_data-\u003ealarm_work, but nothing\ncancels it.  fan_alarm_notify() dereferences fan_data and its hwmon\ndevice.  On unbind, devres frees the interrupt, which only waits for\nthe handler itself, and then releases the hwmon device and fan_data,\nso a pending fan_alarm_notify() can run after those frees.\n\nReplace INIT_WORK() with devm_work_autocancel(), registered before\ndevm_request_irq().  The devres cleanup then frees the interrupt\nfirst, so no new work can be queued, and cancels the work while\nfan_data and the hwmon device are still alive.\n\nThis issue was found by an in-house static analysis tool."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:37:29.592Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7f96803f612134f585ab3b39e6d5b2d4b9c0606f"
        },
        {
          "url": "https://git.kernel.org/stable/c/594c62eea7c82f526054496e9fa9b895122a8016"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e67d9bdac810edacef78cbaeedd34445aa8ceb7"
        },
        {
          "url": "https://git.kernel.org/stable/c/e9fc7d53b2eb34c0a607d1659f49b46911aaf16c"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b12bd724db9db318e3a68be17693583dc29a066"
        },
        {
          "url": "https://git.kernel.org/stable/c/30755d3a5782cd704c8921cac8ee66dffe4383ea"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6ab7f855891877a16d2e2ddf0cd0305fd098a85"
        },
        {
          "url": "https://git.kernel.org/stable/c/a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293"
        }
      ],
      "title": "hwmon: (gpio-fan) Fix use-after-free in alarm work",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97582",
    "datePublished": "2026-09-25T10:22:03.041Z",
    "dateReserved": "2026-09-24T16:01:01.156Z",
    "dateUpdated": "2026-10-30T12:37:29.592Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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