Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: gpio: virtuser: fix UAF in configfs release path The gpio-virtuser configfs release path uses guard(mutex) to protect the device structure. However, the device is freed before the guard cleanup runs, causing mutex_unlock() to operate on freed memory. Specifically, gpio_virtuser_device_config_group_release() destroys the mutex and frees the device while still inside the guard(mutex) scope. When the function returns, the guard cleanup invokes mutex_unlock(&dev->lock), resulting in a slab use-after-free. Limit the mutex lifetime by using a scoped_guard() only around the activation check, so that the lock is released before mutex_destroy() and kfree() are called.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 91581c4b3f29e2e22aeb1a62e842d529ca638b2d before 815a8e3bf72811d402b30bd4a53cde5e9df7a563; affected 91581c4b3f29e2e22aeb1a62e842d529ca638b2d before 7bec90f605cfb138006f5ba575f2310593347110; affected 91581c4b3f29e2e22aeb1a62e842d529ca638b2d before 53ad4a948a4586359b841d607c08fb16c5503230 |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.12.69 through 6.12.*; unaffected 6.18.9 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.