CVE-2026-108952
4.6 MEDIUMpublic exploit availablePublished 2026-10-12 · Updated 2026-10-16
AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.
NVD 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.
CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-843
Public exploit & PoC references
- https://github.com/RT-Thread/rt-thread
- https://github.com/RT-Thread/rt-thread/blob/99428a1e7f7447955aa860f7c969273a12095b8f/components/legacy/usb/usbdevice/class/cdc_vcom.c#L518
- https://github.com/RT-Thread/rt-thread/commit/ceef6e0ccd646aef61b907aeb9f29269d1caba50
- https://github.com/RT-Thread/rt-thread/issues/11739
- https://github.com/RT-Thread/rt-thread/pull/11770
All references
- https://github.com/RT-Thread/rt-thread
- https://github.com/RT-Thread/rt-thread/blob/99428a1e7f7447955aa860f7c969273a12095b8f/components/legacy/usb/usbdevice/class/cdc_vcom.c#L518
- https://github.com/RT-Thread/rt-thread/commit/ceef6e0ccd646aef61b907aeb9f29269d1caba50
- https://github.com/RT-Thread/rt-thread/issues/11739
- https://github.com/RT-Thread/rt-thread/pull/11770
- https://www.vulncheck.com/advisories/rt-thread-through-5.3.0-memory-corruption-via-usb-cdc-vcom-driver
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
Related CVEs
- UNSCOREDCVE-2026-0314
- HIGHCVE-2026-100792
- MEDIUMCVE-2026-100793
- UNSCOREDCVE-2026-101912PoC
- HIGHCVE-2026-102203
- HIGHCVE-2026-102216
- HIGHCVE-2026-102299
- HIGHCVE-2026-102321
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