CVE-2026-31606
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63 ↗
Additional information
- NVD record
- 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
- https://git.kernel.org/stable/c/3aa77f5da0ecb00895411f4246d8a3e4db0343c2
- https://git.kernel.org/stable/c/92f23ab86d9524bc51dae25ed916d0e69dce5992