GHSA-G5H6-RR2F-33X7
Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-97582"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-25T11:17:09Z",
"severity": null
},
"details": "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.",
"id": "GHSA-g5h6-rr2f-33x7",
"modified": "2026-09-25T12:31:25Z",
"published": "2026-09-25T12:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97582"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/30755d3a5782cd704c8921cac8ee66dffe4383ea"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9b12bd724db9db318e3a68be17693583dc29a066"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c6ab7f855891877a16d2e2ddf0cd0305fd098a85"
}
],
"schema_version": "1.4.0",
"severity": []
}
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