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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PX4 | PX4-Autopilot | <= 1.17.0-rc2 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 2 repositories
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SimoesCTT/CTT-Enhanced-PX4-Autopilot-Exploit-CVE-2026-32743 ★ 0 · May 8, 2026
CVE-2026-32743 — PX4 Autopilot Stack Buffer Overflow CTT-Enhanced: 33-Layer Temporal Cascade Drone DoS .The original exploit crashes the MAVLink task via a 60-byte overflow. The CTT version distribut…
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mbanyamer/CVE-2026-32743-PX4-Autopilot-MavlinkLogHandler-Stack-Buffer-Overflow-DoS- ★ 0 · May 8, 2026
A remote Denial of Service (DoS) exploit for PX4 Autopilot versions ≤1.17.0-rc2 via a stack‑based buffer overflow in the MavlinkLogHandler.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.