What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-30 · updated 2026-10-19

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.

Affected products

• Linux kernel: 2.6.27 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/070f341d86cf2c098d63e484a86c7c1d2696a868
• https://git.kernel.org/stable/c/15b9faf53ba8719700596e7ef78879ce200e8c2e
• https://git.kernel.org/stable/c/42988380ac67c76bb9dff8f77d7ef3eefd50b7b5
• https://git.kernel.org/stable/c/4630c68bade82f087eaaab22e9a361da2f18d139
• https://git.kernel.org/stable/c/d3745aaef19198d0c81637a7dd50ef53c4f879b7

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