# CVE-2025-40092: usb: gadget: f_ncm: Refactor bind path to use __free() CVE-2025-40092 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2025-40092, released October 30, 2025. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2025-40092 - Priority: High - CVSS: 7.8 (Moderate) - EPSS: 0.0015 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 30, 2025 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40092 ## 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 ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | bpftool ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-container ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-container ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-container-debug ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-container-debug ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-core ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-core ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug-core ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug-core ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug-devel ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug-devel ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug-modules ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug-modules ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug-modules-extra ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-debug-modules-extra ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-devel ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-devel ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-doc ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-doc ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-modules ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-modules ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-modules-extra ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek-modules-extra ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k-core ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k-core ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k-devel ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k-devel ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k-modules ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k-modules ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k-modules-extra ol 8 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | kernel-uek64k-modules-extra ol 9 | 0:5.15.0-315.196.5.1.el9uek | [ELSA-2025-28048](https://patchblox.com/security/data/fix/linux/elsa-2025-28048.md) | Dec 12, 2025 | | Linux | linux Debian 12.15 (bookworm) | 6.1.158-1 | [DEBIAN-CVE-2025-40092](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40092.md) | Oct 30, 2025 | | Linux | linux Debian 13.5 (trixie) | 6.12.57-1 | [DEBIAN-CVE-2025-40092](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40092.md) | Oct 30, 2025 | | Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-40092](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40092.md) | Oct 30, 2025 | --- Data as of 2026-11-08T19:12:23Z UTC. 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