| Titel | PX4 PX4-Autopilot main and v1.15.4 Race Condition in File Access |
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| Beschreibung | The issue stems from unsynchronized access to the _mavlink_shell pointer shared between:
MavlinkReceiver::handle_message_serial_control() — which may call get_shell() and close_shell(), and
Mavlink::task_main() — which periodically checks _mavlink_shell->available() to send serial output back via MAVLink.
When one thread deletes the _mavlink_shell instance via close_shell() (on receiving a SERIAL_CONTROL without the RESPOND flag), the other thread may still dereference the freed pointer during its polling loop.
This results in a classic use-after-free triggered under specific timing conditions. |
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| Quelle | ⚠️ https://github.com/PX4/PX4-Autopilot/pull/25082 |
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| Benutzer | 0x20z (UID 81279) |
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| Einreichung | 29.07.2025 11:59 (vor 1 Jahr) |
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| Moderieren | 14.08.2025 08:01 (16 days later) |
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| Status | Akzeptiert |
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| VulDB Eintrag | 320081 [PX4 PX4-Autopilot bis 1.15.4 Mavlink Shell Closing mavlink_receiver.cpp handle_message_serial_control _mavlink_shell Pufferüberlauf] |
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| Punkte | 20 |
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