medium5.5
CVE-2026-31606
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 a…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 3.19 before 6.12.83 from 6.13 before 6.18.24 from 6.19 before 6.19.14 from 7.0 before 7.0.1 |
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/3aa77f5da0ecb00895411f4246d8a3e4db0343c2
- https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63
- https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123
- https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d
- https://git.kernel.org/stable/c/92f23ab86d9524bc51dae25ed916d0e69dce5992
- https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43
- https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215