Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.19, < 6.12.83 |
References
- https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63Patch
- https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123Patch
- https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503dPatch
- https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43Patch
- https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215Patch
FAQ
What is CVE-2026-31606?
CVE-2026-31606 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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,...
How severe is CVE-2026-31606?
CVE-2026-31606 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31606?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.