Medium 5.5Published Apr 24, 2026

CVE-2026-31606usb: gadget: f_hid: don't call cdev_init while cdev in use

Updated under an hour ago (Oct 28, 2026, 2:40 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from cb382536052fcc7713988869b54a81137069e5a9 before 3aa77f5da0ecb00895411f4246d8a3e4db0343c2; from cb382536052fcc7713988869b54a81137069e5a9 before c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43; from cb382536052fcc7713988869b54a81137069e5a9 before eb6ef6185f2054a341ec70d7e2165f5381744215; from cb382536052fcc7713988869b54a81137069e5a9 before 5a229016ca3ac551294ec59770be9da94ec4bf63; from cb382536052fcc7713988869b54a81137069e5a9 before 75ecc46828ec377dd5692c677168ef6d64fd7123; from cb382536052fcc7713988869b54a81137069e5a9 before 81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d	CNA record
linux linux_kernel 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	NVD

References

References

https://git.kernel.org/stable/c/3aa77f5da0ecb00895411f4246d8a3e4db0343c2
https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43	patch
https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215	patch
https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63	patch
https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123	patch
https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.