CVE-2026-108952

MediumCVSS 4.6/10Last modified Oct 16, 2026

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.

Metrics

CVSS 3.1 4.6/10CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-843

Affected software

No affected versions have been published.

Timeline

Published: Oct 12, 2026
Last modified: Oct 16, 2026
NVD status: Deferred

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