CVE-2026-32743
MEDIUMPX4 Autopilot: Stack-based Buffer Overflow via Oversized Path Input in MAVLink Log Request Handling
Title source: cnaExploitation Summary
EIP tracks 2 public exploits for CVE-2026-32743. PoCs published by SimoesCTT, mbanyamer.
AI-analyzed exploit summary This repository contains a functional exploit for CVE-2026-32743, targeting a stack buffer overflow in PX4 Autopilot ≤1.17.0-rc2. The exploit uses a 33-layer temporal cascade to achieve a persistent DoS by leveraging MAVLink FTP directory creation and command injection.
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.
Exploits (2)
This repository contains a functional exploit for CVE-2026-32743, targeting a stack buffer overflow in PX4 Autopilot ≤1.17.0-rc2. The exploit uses a 33-layer temporal cascade to achieve a persistent DoS by leveraging MAVLink FTP directory creation and command injection.
This repository contains a functional Python exploit for CVE-2026-32743, a stack-based buffer overflow in PX4 Autopilot's MavlinkLogHandler. The exploit leverages MAVLink FTP to create a long directory path, triggering a crash when the log list is requested.
References (2)
Scores
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H