CVE-2026-97582

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.

• https://git.kernel.org/stable/c/30755d3a5782cd704c8921cac8ee66dffe4383ea
• https://git.kernel.org/stable/c/9b12bd724db9db318e3a68be17693583dc29a066
• https://git.kernel.org/stable/c/a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293
• https://git.kernel.org/stable/c/c6ab7f855891877a16d2e2ddf0cd0305fd098a85

Published

Sep 25, 2026

Last Modified

Sep 25, 2026

Status

Received

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