2025.12.4

withastro/astro2025.12.4Jun 2, 2026by blckmn

AI Summary

This is a maintenance firmware release for Betaflight that focuses on backporting critical stability fixes for race conditions, failsafe procedures, and UART configurations.

Key Highlights

Backports CLI MSP race-condition fix
Backports failsafe procedure range clamping fix
Backports half-duplex pinless UART mode fix

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