2025.12.4

betaflight/betaflight2025.12.4Jun 2, 2026by blckmn

AI Summary

This is a maintenance release for the 2025.12 branch containing backports of stability fixes from the main development line, including MSP race-condition handling and configuration validation.

Key Highlights

Backport of CLI MSP race-condition fix (#15193)
Unconditional clamping of 'failsafe_procedure' to valid range
Guard for half-duplex pinless UART modes

Full Release Notes

<!-- Release notes generated using configuration in .github/release.yml at 2025.12-maintenance -->

## What's Changed
### Fixes
* [2025.12] Backport CLI MSP race-condition fix (#15193) by @blckmn in https://github.com/betaflight/betaflight/pull/15201
* [backport] fix(config): unconditionally clamp failsafe_procedure to valid range by @nerdCopter in https://github.com/betaflight/betaflight/pull/15191
* [backport] fix(uart): guard half-duplex pinless UART modes (#15218) by @haslinghuis in https://github.com/betaflight/betaflight/pull/15258


**Full Changelog**: https://github.com/betaflight/betaflight/compare/2025.12.2...2025.12.4