Garmin uses C unsafe functions such as strcpy and memcpy that have been banned for over 10 years by major companies including Microsoft. Source: Microsoft
Garmin implement threads and not processes and thus its memory is not protected
GarminOS is many years behind in terms of security compared to other Operating Systems such as Linux, Android or iOS. It lacks security mitigations and hardening features that have existed for well over 10 years.
Garmin’s OS is proprietary and thus historically has not had much scrutiny, unlike Linux.
Garmin’s OS is closed-source not open-source. This almost inevitably increases the likelihood of security vulnerabilities being overlooked.
https://the5krunner.com/2023/05/08/garm ... in-models/