Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d6fe1360f42e86262153927986dea6502daff703 before 594c62eea7c82f526054496e9fa9b895122a8016; affected d6fe1360f42e86262153927986dea6502daff703 before 6e67d9bdac810edacef78cbaeedd34445aa8ceb7; affected d6fe1360f42e86262153927986dea6502daff703 before e9fc7d53b2eb34c0a607d1659f49b46911aaf16c; affected d6fe1360f42e86262153927986dea6502daff703 before 9b12bd724db9db318e3a68be17693583dc29a066; affected d6fe1360f42e86262153927986dea6502daff703 before 30755d3a5782cd704c8921cac8ee66dffe4383ea; affected d6fe1360f42e86262153927986dea6502daff703 before c6ab7f855891877a16d2e2ddf0cd0305fd098a85; affected d6fe1360f42e86262153927986dea6502daff703 before a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293 |
| Linux / Linux | affected 2.6.37; unaffected 0 before 2.6.37; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/594c62eea7c82f526054496e9fa9b895122a8016
- https://git.kernel.org/stable/c/6e67d9bdac810edacef78cbaeedd34445aa8ceb7
- https://git.kernel.org/stable/c/e9fc7d53b2eb34c0a607d1659f49b46911aaf16c
- https://git.kernel.org/stable/c/9b12bd724db9db318e3a68be17693583dc29a066
- https://git.kernel.org/stable/c/30755d3a5782cd704c8921cac8ee66dffe4383ea
- https://git.kernel.org/stable/c/c6ab7f855891877a16d2e2ddf0cd0305fd098a85
- https://git.kernel.org/stable/c/a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293