CVE-2025-2329: Silabs.com Openthread

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

In high traffic environments, a Silicon Labs OpenThread RCP (see impacted versions) fails to clear the SPI transmit buffer and may send a corrupt packet over SPI to its host,  causing the host to reset the RCP which results in a denial of service.

Affected products

• Silabs.com Openthread: from 2.5.0, up to and including 2.5.2; from 2.6.0, up to and including 2.6.2; up to and including 2.4.6

Published 2025-07-25. Last modified 2026-06-17.