High 7.8Published Oct 30, 2025

CVE-2025-40092usb: gadget: f_ncm: Refactor bind path to use __free()

Updated under an hour ago (Oct 27, 2026, 2:10 AM ET)

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Exploited in the last 30 days

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

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: Deferred
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 9f6ce4240a2bf456402c15c06768059e5973f28c before 185193a4714aa9c78437a7a1858fbe5771f0f45c; from 9f6ce4240a2bf456402c15c06768059e5973f28c before f37de8dec6a4c379b4b8486003a1de00ff8cff3b; 9f6ce4240a2bf456402c15c06768059e5973f28c builds before 1cde4516295a030cb8ab4c93114ca3b6c3c6a1e2; from 9f6ce4240a2bf456402c15c06768059e5973f28c before d3fe7143928d8dfa2ec7bac9f906b48bc75b98ee; from 9f6ce4240a2bf456402c15c06768059e5973f28c before ed78f4d6079d872432b1ed54f155ef61965d3137; from 9f6ce4240a2bf456402c15c06768059e5973f28c before 75a5b8d4ddd4eb6b16cb0b475d14ff4ae64295ef	CNA record

References

References

https://git.kernel.org/stable/c/185193a4714aa9c78437a7a1858fbe5771f0f45c
https://git.kernel.org/stable/c/f37de8dec6a4c379b4b8486003a1de00ff8cff3b
https://git.kernel.org/stable/c/1cde4516295a030cb8ab4c93114ca3b6c3c6a1e2
https://git.kernel.org/stable/c/d3fe7143928d8dfa2ec7bac9f906b48bc75b98ee
https://git.kernel.org/stable/c/ed78f4d6079d872432b1ed54f155ef61965d3137
https://git.kernel.org/stable/c/75a5b8d4ddd4eb6b16cb0b475d14ff4ae64295ef

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.