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.
PoC: CTT-Enhanced-PX4-Autopilot-Exploit-CVE-2026-32743
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 distributes the overflow across 33 temporal layers, each with phase resonance timing and temporal wedge filtering. Result: Persistent DoS. Unpatchable.
PoC: CVE-2026-32743-PX4-Autopilot-MavlinkLogHandler-Stack-Buffer-Overflow-DoS-
A remote Denial of Service (DoS) exploit for PX4 Autopilot versions ≤1.17.0-rc2 via a stack‑based buffer overflow in the MavlinkLogHandler.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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