nodemcu before v3.0.0-release_20240225 was discovered to contain an integer overflow via the getnum function at /modules/struct.c.
https://github.com/nodemcu/nodemcu-firmware/pull/3635
https://github.com/nodemcu/nodemcu-firmware/pull/3634
https://github.com/nodemcu/nodemcu-firmware/pull/3633