CVE-2025-40092usb: gadget: f_ncm: Refactor bind path to use __free()
- 7.8HighCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: Refactor bind path to use __free() After an bind/unbind cycle, the ncm->notify_req is left stale. If a subsequent bind fails, the unified error label attempts to free this stale request, leading to a NULL pointer dereference when accessing ep->ops->free_request. Refactor the error handling in the bind path to use the __free() automatic cleanup mechanism. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 Call trace: usb_ep_free_request+0x2c/0xec ncm_bind+0x39c/0x3dc usb_add_function+0xcc/0x1f0 configfs_composite_bind+0x468/0x588 gadget_bind_driver+0x104/0x270 really_probe+0x190/0x374 __driver_probe_device+0xa0/0x12c driver_probe_device+0x3c/0x218 __device_attach_driver+0x14c/0x188 bus_for_each_drv+0x10c/0x168 __device_attach+0xfc/0x198 device_initial_probe+0x14/0x24 bus_probe_device+0x94/0x11c device_add+0x268/0x48c usb_add_gadget+0x198/0x28c dwc3_gadget_init+0x700/0x858 __dwc3_set_mode+0x3cc/0x664 process_scheduled_works+0x1d8/0x488 worker_thread+0x244/0x334 kthread+0x114/0x1bc ret_from_fork+0x10/0x20
Timeline
ID reserved
By Linux
- 7 months later
· 7 months later
Published
- 9 months later
· 9 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 95% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 9f6ce4240a2bf456402c15c06768059e5973f28c – < 185193a4714aa9c78437a7a1858fbe5771f0f45c
- affected 9f6ce4240a2bf456402c15c06768059e5973f28c – < f37de8dec6a4c379b4b8486003a1de00ff8cff3b
- affected 9f6ce4240a2bf456402c15c06768059e5973f28c – < 1cde4516295a030cb8ab4c93114ca3b6c3c6a1e2
- affected 9f6ce4240a2bf456402c15c06768059e5973f28c – < d3fe7143928d8dfa2ec7bac9f906b48bc75b98ee
- affected 9f6ce4240a2bf456402c15c06768059e5973f28c – < ed78f4d6079d872432b1ed54f155ef61965d3137
- affected 9f6ce4240a2bf456402c15c06768059e5973f28c – < 75a5b8d4ddd4eb6b16cb0b475d14ff4ae64295ef
- affected 2.6.38
- unaffected < 2.6.38
- unaffected 5.15.196 – ≤ 5.15.*
- unaffected 6.1.158 – ≤ 6.1.*
- unaffected 6.6.114 – ≤ 6.6.*
- unaffected 6.12.55 – ≤ 6.12.*
- unaffected 6.17.5 – ≤ 6.17.*
- unaffected 6.18 – ≤ *
References
References6
- https://git.kernel.org/stable/c/185193a4714aa9c78437a7a1858fbe5771f0f45c (opens in a new tab)
- https://git.kernel.org/stable/c/f37de8dec6a4c379b4b8486003a1de00ff8cff3b (opens in a new tab)
- https://git.kernel.org/stable/c/1cde4516295a030cb8ab4c93114ca3b6c3c6a1e2 (opens in a new tab)
- https://git.kernel.org/stable/c/d3fe7143928d8dfa2ec7bac9f906b48bc75b98ee (opens in a new tab)
- https://git.kernel.org/stable/c/ed78f4d6079d872432b1ed54f155ef61965d3137 (opens in a new tab)
- https://git.kernel.org/stable/c/75a5b8d4ddd4eb6b16cb0b475d14ff4ae64295ef (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-36986 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-40092)Record last updated .