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NVD / CVE Program· CNA Linux

CVE-2026-31727: usb: gadget: u_ether: Fix NULL pointer deref in eth_get_drvinfo

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: 0.12% (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 0326429e8ba99892e1d1e115dc8e88e1a3b64e24, 6.12.81, 6.18.22.

Low priority for now. Upgrade to Linux Linux 0326429e8ba99892e1d1e115dc8e88e1a3b64e24, 6.12.81, 6.18.22 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: u_ether: Fix NULL pointer deref in eth_get_drvinfo Commit ec35c1969650 ("usb: gadget: f_ncm: Fix net_device lifecycle with device_move") reparents the gadget device to /sys/devices/virtual during unbind, clearing the gadget pointer. If the userspace tool queries on the surviving interface during this detached window, this leads to a NULL pointer dereference. Unable to handle kernel NULL pointer dereference Call trace: eth_get_drvinfo+0x50/0x90 ethtool_get_drvinfo+0x5c/0x1f0 __dev_ethtool+0xaec/0x1fe0 dev_ethtool+0x134/0x2e0 dev_ioctl+0x338/0x560 Add a NULL check for dev->gadget in eth_get_drvinfo(). When detached, skip copying the fw_version and bus_info strings, which is natively handled by ethtool_get_drvinfo for empty strings.

Published
May 1, 2026
Updated
Nov 11, 2026
EPSS
0.1% · 2th percentile

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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Follow CVE-2026-31727

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  • when exploit code appears or is weaponized
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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

    • 7c97366f5dac5255e60a317ffe3a5b18f3745547 and later · before f9f987472f4b8ab177be2b6492a59278ed969479affected · git
    • 36c41e9724c9a7a7cda37f5a4e9d94f25c8031c4 and later · before 7fce959e9be3bf63bb0fdf4b05f9cc42cb289fe2affected · git
    • 93f116c3393a22acab96ad1bef12b2572eb80ca4 and later · before 0326429e8ba99892e1d1e115dc8e88e1a3b64e24affected · git
    • e584cb58a2ea7ff4d3a4bc43d5ca512ed3ecb77d and later · before a36e5e800b9c93e3e1ffa42f34d38b36775dbceeaffected · git
    • 85acaba2f42b557499bab3608307f17bf13beb69 and later · before 7de4d46be40738c7e48e64b5cc0a34aa1e047b0aaffected · git
    • ec35c1969650e7cb6c8a91020e568ed46e3551b0 and later · before e002e92e88e12457373ed096b18716d97e7bbb20affected · git
    • 6.12.78 and later · before 6.12.81affected · semver
    • 6.18.19 and later · before 6.18.22affected · semver
    • 6.19.9 and later · before 6.19.12affected · 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 kernel6.12.78 and later · before 6.12.81
  • linux linux kernel6.18.19 and later · before 6.18.22
  • linux linux kernel6.19.9 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: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-2026-31725May 1, 2026 · usb: gadget: f_ecm: Fix net_device lifecycle with device_move
    22Monitor
  • ← EarlierCVE-2026-31726May 1, 2026 · usb: gadget: uvc: fix NULL pointer dereference during unbind race
    22Monitor
  • Later →CVE-2026-31728May 1, 2026 · usb: gadget: u_ether: Fix race between gether_disconnect and eth_stop
    18Monitor

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 Linux0326429e8ba99892e1d1e115dc8e88e1a3b64e24Vendor (CNA)
Linux Linux6.12.81Vendor (CNA)
Linux Linux6.18.22Vendor (CNA)
Linux Linux6.19.12Vendor (CNA)
Linux Linux7de4d46be40738c7e48e64b5cc0a34aa1e047b0aVendor (CNA)
Linux Linux7fce959e9be3bf63bb0fdf4b05f9cc42cb289fe2Vendor (CNA)
Linux Linuxa36e5e800b9c93e3e1ffa42f34d38b36775dbceeVendor (CNA)
Linux Linuxe002e92e88e12457373ed096b18716d97e7bbb20Vendor (CNA)
Linux Linuxf9f987472f4b8ab177be2b6492a59278ed969479Vendor (CNA)
debian:linux6.19.12-1 · Debian:14Package 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)

CWE-476 · NULL Pointer Dereference

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