Medium · published April 24, 2026
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: f_hid: don't call cdev_init while cdev in use
When calling unbind, then bind again, cdev_init reinitialized the cdev,
even though there may still be references to it. That's the case when
the /dev/hidg* device is still opened. This obviously unsafe behavior
like oopes.
This fixes this by using cdev_alloc to put the cdev on the heap. That
way, we can simply allocate a new one in hidg_bind.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 3.19, < 6.12.83 | 6.12.83 |
| linux/linux_kernel | ≥ 6.13, < 6.18.24 | 6.18.24 |
| linux/linux_kernel | ≥ 6.19, < 6.19.14 | 6.19.14 |
| linux/linux_kernel | ≥ 7.0, < 7.0.1 | 7.0.1 |