CVE-2026-43424

Kernel panic via unchecked USB nexus dereference

Published May 8, 2026 · Updated May 8, 2026

NULL pointer dereference in the Linux Kernel USB Target driver allows local users to crash the kernel with crafted BOT requests. The bot_submit_command and data-transfer paths copy tpg->tpg_nexus into tv_nexus and dereference tv_nexus->tvn_se_sess without NULL validation. The USB Target gadget must be configured through ConfigFS, and a host request must race nexus establishment or removal; impact is limited to a kernel panic.

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 the Linux Kernel USB Target driver allows local users to crash the kernel with crafted BOT requests. The bot_submit_command and data-transfer paths copy tpg->tpg_nexus into tv_nexus and dereference tv_nexus->tvn_se_sess without NULL validation. The USB Target gadget must be configured through ConfigFS, and a host request must race nexus establishment or removal; impact is limited to a kernel panic.

The record

CVE
CVE-2026-43424
Published
May 8, 2026
Updated
May 8, 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 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=3.5
  2. Affected versionversion=c52661d60f636d17e26ad834457db333bd1df494 <2a2ef846a54a06c33b5c2d4b0d918583e1e7c0b7
  3. Affected versionversion=c52661d60f636d17e26ad834457db333bd1df494 <3d309b37633c4a847fc149939a2c9576f1aa1065
  4. Affected versionversion=c52661d60f636d17e26ad834457db333bd1df494 <679d9535aeb15c10bce89c44102004b96624d706
  5. Affected versionversion=c52661d60f636d17e26ad834457db333bd1df494 <b9b26d7f3aa288cfa54a7bc68612bab1f153f156
  6. Affected versionversion=c52661d60f636d17e26ad834457db333bd1df494 <b9fde507355342a2d64225d582dc8b98ff5ecb19
  7. Affected versionversion=c52661d60f636d17e26ad834457db333bd1df494 <d146f27758049fa55ae4c53785a852d3cf7a18d6
  8. Affected versionversion=c52661d60f636d17e26ad834457db333bd1df494 <f962ca3b020e13d6714f27e8c36fe742441c58d1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.5; version=c52661d60f636d17e26ad834457db333bd1df494 <2a2ef846a54a06c33b5c2d4b0d918583e1e7c0b7; version=c52661d60f636d17e26ad834457db333bd1df494 <3d309b37633c4a847fc149939a2c9576f1aa1065; version=c52661d60f636d17e26ad834457db333bd1df494 <679d9535aeb15c10bce89c44102004b96624d706; version=c52661d60f636d17e26ad834457db333bd1df494 <b9b26d7f3aa288cfa54a7bc68612bab1f153f156; version=c52661d60f636d17e26ad834457db333bd1df494 <b9fde507355342a2d64225d582dc8b98ff5ecb19; version=c52661d60f636d17e26ad834457db333bd1df494 <d146f27758049fa55ae4c53785a852d3cf7a18d6; version=c52661d60f636d17e26ad834457db333bd1df494 <f962ca3b020e13d6714f27e8c36fe742441c58d1

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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

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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
T1499.004Application 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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