During June 2025, Stéphane Leroy focused on enhancing the mcuboot repository by addressing a critical bug in the bootloader’s size calculation logic. He improved the handling of data chunks containing both headers and TLVs, ensuring accurate encryption and decryption size computations. This fix, implemented in C and leveraging his expertise in embedded systems and firmware development, prevented potential data corruption during region copy operations. Stéphane validated the solution through targeted code review and testing, which strengthened the reliability of firmware updates and secure boot processes. His work demonstrated careful attention to detail and a deep understanding of bootloader internals.