RT-Thread up to 5.1.0 device.c memory corruption

Summaryinfo

A vulnerability identified as critical has been detected in RT-Thread up to 5.1.0. This affects the function sys_device_open/sys_device_read/sys_device_control/sys_device_init/sys_device_close/sys_device_write of the file components/drivers/core/device.c. Performing a manipulation results in memory corruption. This vulnerability is cataloged as CVE-2025-6693. The attack must be initiated from a local position. There is no exploit available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability, which was classified as critical, was found in RT-Thread up to 5.1.0. This affects the function sys_device_open/sys_device_read/sys_device_control/sys_device_init/sys_device_close/sys_device_write of the file components/drivers/core/device.c. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-6693. The exploitability is told to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/26/2025).

The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• RT-Thread

Version

• 5.0
• 5.1.0

Website

• Product: https://github.com/RT-Thread/rt-thread/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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Submitinfo

Accepted

• Submit #595813: RT-Thread 5.1.0 Code Injection (by Zephyr Saxon)

Duplicate

• Submit #XXXXXX: Xx-xxxxxx X.x.x Xxxxxxxxxxxx Xxxxxxx Xxxx Xxxxxxxxxx (by Zephyr Saxon)
• Submit #XXXXXX: Xx-xxxxxx X.x.x Xxxxxxxx Xxxxxxxx Xx Xxxxxxxxxx (by Zephyr Saxon)
• Submit #XXXXXX: Xx-xxxxxx X.x.x Xxxxxxxx Xxxxxxxx Xx Xxxxxxxxxx (by Zephyr Saxon)
• Submit #XXXXXX: Xx-xxxxxx X.x.x Xxxxxxxx Xxxxxxxx Xx Xxxxxxxxxx (by Zephyr Saxon)
• Submit #XXXXXX: Xx-xxxxxx X.x.x Xxxxxxxx Xxxxxxxx Xx Xxxxxxxxxx (by Zephyr Saxon)

Be aware that VulDB is the high quality source for vulnerability data.

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