CVE-2026-10644

The CVE describes an out-of-bounds write in Microchip SERCOM-G1 UART driver (drivers/serial/uart_mchp_sercom_g1.c) used by the PIC32CM-JH family. When uart_rx_enable() is called with a one-byte receive buffer (len == 1) and CONFIG_UART_MCHP_ASYNC is enabled, the RX-complete ISR starts a single-be...

CVE-2026-10644 Out-of-bounds write in Microchip SERCOM-G1 (PIC32CM-JH) async UART RX with 1-byte buffer

The Microchip SERCOM-G1 UART driver drivers/serial/uartmchpsercomg1.c, used by the PIC32CM-JH SoC family, contains an out-of-bounds write in its asynchronous DMA receive path. When uartrxenable is invoked with a one-byte receive buffer len == 1 and CONFIGUARTMCHPASYNC is enabled, the RX-complete...