CVE-2026-19571 Race condition in ITE IT8xxx2 SHI host-command backend lets a second SPI request write an unvalidated length into the in-flight request buffer

The ITE IT8xxx2 SHI host-command backend subsys/mgmt/echostcmd/backends/echostcmdbackendshiite.c copied the 8-byte host-command request header from the SPI Rx FIFO directly into the shared receive buffer data-inmsg and only afterwards checked the protocol version and the derived packet length. Th...