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NVD / CVE Program· CNA Linux

CVE-2026-31725: usb: gadget: f_ecm: Fix net_device lifecycle with device_move

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.15% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 40c4d35c71a170889fe9333a1feb69a4dd5d4365, 4e34f3f491fd731809b57ddb5329ec763bd39553, 5eaeac22240d965d24c3bd0c54ded64efd8f6ca1.

Low priority for now. Upgrade to Linux Linux 40c4d35c71a170889fe9333a1feb69a4dd5d4365, 4e34f3f491fd731809b57ddb5329ec763bd39553, 5eaeac22240d965d24c3bd0c54ded64efd8f6ca1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ecm: Fix net_device lifecycle with device_move The net_device is allocated during function instance creation and registered during the bind phase with the gadget device as its sysfs parent. When the function unbinds, the parent device is destroyed, but the net_device survives, resulting in dangling sysfs symlinks: console:/ # ls -l /sys/class/net/usb0 lrwxrwxrwx ... /sys/class/net/usb0 -> /sys/devices/platform/.../gadget.0/net/usb0 console:/ # ls -l /sys/devices/platform/.../gadget.0/net/usb0 ls: .../gadget.0/net/usb0: No such file or directory Use device_move() to reparent the net_device between the gadget device tree and /sys/devices/virtual across bind and unbind cycles. During the final unbind, calling device_move(NULL) moves the net_device to the virtual device tree before the gadget device is destroyed. On rebinding, device_move() reparents the device back under the new gadget, ensuring proper sysfs topology and power management ordering. To maintain compatibility with legacy composite drivers (e.g., multi.c), the bound flag is used to indicate whether the network device is shared and pre-registered during the legacy driver's bind phase.

Published
May 1, 2026
Updated
Nov 11, 2026
EPSS
0.1% · 4th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.11affected
    • fee562a6450b7806f1fbbe1469a67b5395b5c10a and later · before 40c4d35c71a170889fe9333a1feb69a4dd5d4365affected · git
    • fee562a6450b7806f1fbbe1469a67b5395b5c10a and later · before fdc3aa4c23d3e0ed781ca0e10213c645e445cc03affected · git
    • fee562a6450b7806f1fbbe1469a67b5395b5c10a and later · before 5eaeac22240d965d24c3bd0c54ded64efd8f6ca1affected · git
    • fee562a6450b7806f1fbbe1469a67b5395b5c10a and later · before 4e34f3f491fd731809b57ddb5329ec763bd39553affected · git
    • fee562a6450b7806f1fbbe1469a67b5395b5c10a and later · before 9b1e5589593293c78a2ab8bb118a41e2271a2af8affected · git
    • fee562a6450b7806f1fbbe1469a67b5395b5c10a and later · before b2cc4fae67a51f60d81d6af2678696accb07c656affected · git
    • before 3.11not affected · semver
    • 6.1.191 and later · up to and including 6.1.*not affected · semver
    • 6.6.160 and later · up to and including 6.6.*not affected · semver
Affected versions · NVD (4)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.11 and later · before 6.12.81
  • linux linux kernel6.13 and later · before 6.18.22
  • linux linux kernel6.19 and later · before 6.19.12
  • linux linux kernel7.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.12-16.19.12-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-31723May 1, 2026 · usb: gadget: f_subset: Fix net_device lifecycle with device_move
    22Monitor
  • ← EarlierCVE-2026-31724May 1, 2026 · usb: gadget: f_eem: Fix net_device lifecycle with device_move
    22Monitor
  • Later →CVE-2026-31726May 1, 2026 · usb: gadget: uvc: fix NULL pointer dereference during unbind race
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux40c4d35c71a170889fe9333a1feb69a4dd5d4365Vendor (CNA)
Linux Linux4e34f3f491fd731809b57ddb5329ec763bd39553Vendor (CNA)
Linux Linux5eaeac22240d965d24c3bd0c54ded64efd8f6ca1Vendor (CNA)
Linux Linux9b1e5589593293c78a2ab8bb118a41e2271a2af8Vendor (CNA)
Linux Linuxb2cc4fae67a51f60d81d6af2678696accb07c656Vendor (CNA)
Linux Linuxfdc3aa4c23d3e0ed781ca0e10213c645e445cc03Vendor (CNA)
debian:linux6.12.85-1 · Debian:13Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records