CVE-2026-10679 Divide-by-zero in DesignWare SPI driver reachable from spi_transceive syscall (local DoS)

The DesignWare SPI driver drivers/spi/spidw.c computed the SPI BAUDR clock divider as info-clockfrequency / config-frequency without validating config-frequency. spitransceive is a Zephyr syscall and its verify handler drivers/spi/spihandlers.c copies the caller-supplied spiconfig from userspace...