| 标题 | PX4 PX4-Autopilot main and v1.15.4 Race Condition in File Access |
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| 描述 | 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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| 来源 | ⚠️ https://github.com/PX4/PX4-Autopilot/pull/25082 |
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| 用户 | 0x20z (UID 81279) |
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| 提交 | 2025-07-29 11時59分 (1 年前) |
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| 管理 | 2025-08-14 08時01分 (16 days later) |
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| 状态 | 已接受 |
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| VulDB条目 | 320081 [PX4 PX4-Autopilot 直到 1.15.4 Mavlink Shell Closing mavlink_receiver.cpp handle_message_serial_control _mavlink_shell 内存损坏] |
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| 积分 | 20 |
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