kosma minmea CVE-2026-29974

Update to minmea version later than 0.3.0 if a patched release is available - verify current version at https://github.com/kosma/minmea/releases and review commit history for buffer overflow fixes. No specific patched version number is confirmed in available CVE references at time of analysis, requiring manual verification with upstream maintainer. If immediate patching is not feasible, implement input validation wrapper functions that enforce maximum field lengths before calling minmea_scan, though this requires source code modification and thorough testing to avoid breaking GPS functionality. Alternative mitigation: restrict NMEA input sources to trusted local GPS hardware only, blocking network-sourced NMEA streams entirely through firewall rules or application-level input filtering - this eliminates remote attack vector (AV:N) but may break legitimate use cases requiring networked GPS data. For systems that must process untrusted NMEA input, consider migrating to alternative NMEA parsing libraries with demonstrated secure string handling (e.g., gpsd's parser, libnmea). Compile applications with stack canaries (gcc -fstack-protector-strong) and ASLR enabled as defense-in-depth measures to detect/mitigate exploitation attempts - note these do not eliminate the vulnerability but increase exploitation difficulty. Review the exploit demonstration at https://gist.github.com/dwilliams27/6d4d8077b970f35e1a921c897ce13852 to understand attack vectors and validate mitigation effectiveness.