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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-43424 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_tcm: Fix NULL pointer dereferences in nexus handling The `tpg->tpg_nexus` pointer in the USB Target driver is dynamically managed and tied to userspace configuration via ConfigFS. It can be NULL if the USB host sends requests before the nexus is fully established or immediately after it is dropped. Currently, functions like `bot_submit_command()` and the data transfer paths retrieve `tv_nexus = tpg->tpg_nexus` and immediately dereference `tv_nexus->tvn_se_sess` without any validation. If a malicious or misconfigured USB host sends a BOT (Bulk-Only Transport) command during this race window, it triggers a NULL pointer dereference, leading to a kernel panic (local DoS). This exposes an inconsistent API usage within the module, as peer functions like `usbg_submit_command()` and `bot_send_bad_response()` correctly implement a NULL check for `tv_nexus` before proceeding. Fix this by bringing consistency to the nexus handling. Add the missing `if (!tv_nexus)` checks to the vulnerable BOT command and request processing paths, aborting the command gracefully with an error instead of crashing the system.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/2a2ef846a54a06c33b5c2d4b0d918583e1e7c0b7 kernel.org Patch 
https://git.kernel.org/stable/c/3d309b37633c4a847fc149939a2c9576f1aa1065 kernel.org Patch 
https://git.kernel.org/stable/c/679d9535aeb15c10bce89c44102004b96624d706 kernel.org Patch 
https://git.kernel.org/stable/c/b9b26d7f3aa288cfa54a7bc68612bab1f153f156 kernel.org Patch 
https://git.kernel.org/stable/c/b9fde507355342a2d64225d582dc8b98ff5ecb19 kernel.org Patch 
https://git.kernel.org/stable/c/d146f27758049fa55ae4c53785a852d3cf7a18d6 kernel.org Patch 
https://git.kernel.org/stable/c/f962ca3b020e13d6714f27e8c36fe742441c58d1 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43424
NVD Published Date:
05/08/2026
NVD Last Modified:
05/20/2026
Source:
kernel.org