Review reviewHigh

CVE-2025-40093

Linux

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.

CVSS: 7.8
EPSS: 0.14%
CISA KEV: Not listed
Published: 2025.10.30

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.14%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= da741b8c56d612b5dd26ffa31341911a5fea23ee < d3745aaef19198d0c81637a7dd50ef53c4f879b7, >= da741b8c56d612b5dd26ffa31341911a5fea23ee < 070f341d86cf2c098d63e484a86c7c1d2696a868, >= da741b8c56d612b5dd26ffa31341911a5fea23ee < 15b9faf53ba8719700596e7ef78879ce200e8c2e, >= da741b8c56d612b5dd26ffa31341911a5fea23ee < 4630c68bade82f087eaaab22e9a361da2f18d139, >= da741b8c56d612b5dd26ffa31341911a5fea23ee < 42988380ac67c76bb9dff8f77d7ef3eefd50b7b5, >= 2.6.27
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available