# CVE-2025-40093: usb: gadget: f_ecm: Refactor bind path to use __free()

CVE-2025-40093 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-40093, released October 30, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-40093
- Priority: High
- CVSS: 7.8 (Important)
- 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-2025-40093

## Description

In the Linux kernel, the following vulnerability has been resolved:  usb: gadget: f_ecm: Refactor bind path to use __free()  After an bind/unbind cycle, the ecm->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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.158-1 | [DEBIAN-CVE-2025-40093](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40093.md) | Oct 30, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.12.57-1 | [DEBIAN-CVE-2025-40093](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40093.md) | Oct 30, 2025 |
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-40093](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40093.md) | Oct 30, 2025 |

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