CVE-2026-97582
Description
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.
How to fix
- Linux Linux7f96803f612134f585ab3b39e6d5b2d4b9c0606f, 594c62eea7c82f526054496e9fa9b895122a8016, 6e67d9bdac810edacef78cbaeedd34445aa8ceb7, e9fc7d53b2eb34c0a607d1659f49b46911aaf16c, 9b12bd724db9db318e3a68be17693583dc29a066, 30755d3a5782cd704c8921cac8ee66dffe4383ea, c6ab7f855891877a16d2e2ddf0cd0305fd098a85, a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | d6fe1360f42e86262153927986dea6502daff703 ≤ v < 7f96803f612134f585ab3b39e6d5b2d4b9c0606f, d6fe1360f42e86262153927986dea6502daff703 ≤ v < 594c62eea7c82f526054496e9fa9b895122a8016, d6fe1360f42e86262153927986dea6502daff703 ≤ v < 6e67d9bdac810edacef78cbaeedd34445aa8ceb7, d6fe1360f42e86262153927986dea6502daff703 ≤ v < e9fc7d53b2eb34c0a607d1659f49b46911aaf16c, d6fe1360f42e86262153927986dea6502daff703 ≤ v < 9b12bd724db9db318e3a68be17693583dc29a066, d6fe1360f42e86262153927986dea6502daff703 ≤ v < 30755d3a5782cd704c8921cac8ee66dffe4383ea, d6fe1360f42e86262153927986dea6502daff703 ≤ v < c6ab7f855891877a16d2e2ddf0cd0305fd098a85, d6fe1360f42e86262153927986dea6502daff703 ≤ v < a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293, 2.6.37 | 7f96803f612134f585ab3b39e6d5b2d4b9c0606f, 594c62eea7c82f526054496e9fa9b895122a8016, 6e67d9bdac810edacef78cbaeedd34445aa8ceb7, e9fc7d53b2eb34c0a607d1659f49b46911aaf16c, 9b12bd724db9db318e3a68be17693583dc29a066, 30755d3a5782cd704c8921cac8ee66dffe4383ea, c6ab7f855891877a16d2e2ddf0cd0305fd098a85, a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293 |
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