CVE-2026-108952 RT-Thread through 5.3.0 Memory Corruption via USB CDC VCOM Driver

RT-Thread through 5.3.0 contains a memory corruption vulnerability in the legacy USB CDC virtual COM port driver that aliases rxringbuffer as a Serial V2 rtserialrxfifo in functionenable. A connected USB host configuring the CDC device triggers writes past the ring buffer into struct vcom members...