CVE-2026-108952
Medium
Description
RT-Thread through 5.3.0 contains a memory corruption vulnerability in the legacy USB CDC virtual COM port driver that aliases rx_ringbuffer as a Serial V2 rt_serial_rx_fifo in _function_enable(). A connected USB host configuring the CDC device triggers writes past the ring buffer into struct vcom members and an invalid rt_free() on close, causing denial of service.
SeverityMedium
CVSS4.6
Exploit probability—
ProductRt-thread
PublishedOct 12, 2026
First seenOct 12, 2026
Weakness typeCWE-843CWE-843
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| RT-Thread rt-thread | v ≤ 5.3.0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.