gpsd versions 2.90 to 3.17 and microjson versions 1.0 to 1.3, an open source project, allow a stack-based buffer overflow, which may allow remote attackers to execute arbitrary code on embedded platforms via traffic on Port 2947/TCP or crafted JSON inputs.
https://ics-cert.us-cert.gov/advisories/ICSA-18-310-01
https://lists.debian.org/debian-lts-announce/2019/03/msg00040.html
https://lists.debian.org/debian-lts-announce/2021/10/msg00024.html