usb: gadget: f_hid: don't call cdev_init while cdev in use
Summary
| CVE | CVE-2026-31606 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-24 15:16:39 UTC |
| Updated | 2026-04-29 20:00:34 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.000180000 probability, percentile 0.048130000 (date 2026-04-27)
Problem Types: NVD-CWE-noinfo
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected cb382536052fcc7713988869b54a81137069e5a9 c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43 git | Not specified |
| CNA | Linux | Linux | affected cb382536052fcc7713988869b54a81137069e5a9 eb6ef6185f2054a341ec70d7e2165f5381744215 git | Not specified |
| CNA | Linux | Linux | affected cb382536052fcc7713988869b54a81137069e5a9 5a229016ca3ac551294ec59770be9da94ec4bf63 git | Not specified |
| CNA | Linux | Linux | affected cb382536052fcc7713988869b54a81137069e5a9 75ecc46828ec377dd5692c677168ef6d64fd7123 git | Not specified |
| CNA | Linux | Linux | affected cb382536052fcc7713988869b54a81137069e5a9 81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d git | Not specified |
| CNA | Linux | Linux | affected 3.19 | Not specified |
| CNA | Linux | Linux | unaffected 3.19 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.83 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.24 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.14 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.1 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.