Vulnerability Description
PX4 is an open-source autopilot stack for drones and unmanned vehicles. Versions 1.17.0-rc2 and below are vulnerable to Stack-based Buffer Overflow through the MavlinkLogHandler, and are triggered via MAVLink log request. The LogEntry.filepath buffer is 60 bytes, but the sscanf function parses paths from the log list file with no width specifier, allowing a path longer than 60 characters to overflow the buffer. An attacker with MAVLink link access can trigger this by first creating deeply nested directories via MAVLink FTP, then requesting the log list. The flight controller MAVLink task crashes, losing telemetry and command capability and causing DoS. This issue has been fixed in this commit: https://github.com/PX4/PX4-Autopilot/commit/616b25a280e229c24d5cf12a03dbf248df89c474.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Dronecode | Px4 Drone Autopilot | < 1.17.0 |
Related Weaknesses (CWE)
References
- https://github.com/PX4/PX4-Autopilot/commit/616b25a280e229c24d5cf12a03dbf248df89Patch
- https://github.com/PX4/PX4-Autopilot/security/advisories/GHSA-97c4-68r9-96p5ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-32743?
CVE-2026-32743 is a vulnerability with a CVSS score of 6.5 (MEDIUM). PX4 is an open-source autopilot stack for drones and unmanned vehicles. Versions 1.17.0-rc2 and below are vulnerable to Stack-based Buffer Overflow through the MavlinkLogHandler, and are triggered via...
How severe is CVE-2026-32743?
CVE-2026-32743 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32743?
Check the references section above for vendor advisories and patch information. Affected products include: Dronecode Px4 Drone Autopilot.