CVE-2026-31727

Local kernel crash via detached gadget dereference

Published May 1, 2026 · Updated May 1, 2026

NULL pointer dereference in affected Linux Kernel releases allows local users to crash the kernel through an ethtool driver-info query. During USB gadget unbind, reparenting clears dev->gadget while the network interface survives, and eth_get_drvinfo dereferences it while copying driver information. A local user must query the surviving USB gadget Ethernet interface during the detached window, producing a kernel crash and service interruption.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected Linux Kernel releases allows local users to crash the kernel through an ethtool driver-info query. During USB gadget unbind, reparenting clears dev->gadget while the network interface survives, and eth_get_drvinfo dereferences it while copying driver information. A local user must query the surviving USB gadget Ethernet interface during the detached window, producing a kernel crash and service interruption.

The record

CVE
CVE-2026-31727
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.12.78 <6.12.81
  2. Affected versionversion=6.18.19 <6.18.22
  3. Affected versionversion=6.19.9 <6.19.12
  4. Affected versionversion=85acaba2f42b557499bab3608307f17bf13beb69 <7de4d46be40738c7e48e64b5cc0a34aa1e047b0a
  5. Affected versionversion=93f116c3393a22acab96ad1bef12b2572eb80ca4 <0326429e8ba99892e1d1e115dc8e88e1a3b64e24
  6. Affected versionversion=e584cb58a2ea7ff4d3a4bc43d5ca512ed3ecb77d <a36e5e800b9c93e3e1ffa42f34d38b36775dbcee
  7. Affected versionversion=ec35c1969650e7cb6c8a91020e568ed46e3551b0 <e002e92e88e12457373ed096b18716d97e7bbb20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.12.78 <6.12.81; version=6.18.19 <6.18.22; version=6.19.9 <6.19.12; version=85acaba2f42b557499bab3608307f17bf13beb69 <7de4d46be40738c7e48e64b5cc0a34aa1e047b0a; version=93f116c3393a22acab96ad1bef12b2572eb80ca4 <0326429e8ba99892e1d1e115dc8e88e1a3b64e24; version=e584cb58a2ea7ff4d3a4bc43d5ca512ed3ecb77d <a36e5e800b9c93e3e1ffa42f34d38b36775dbcee; version=ec35c1969650e7cb6c8a91020e568ed46e3551b0 <e002e92e88e12457373ed096b18716d97e7bbb20

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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