CVE-2025-2329

High traffic causes corrupt SPI packets in OpenThread leading to denial of service

State: Published
Severity: 5.3 Medium
Published: Jul 25, 2025
Updated: Aug 4, 2025
Reserved: Mar 14, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	Silabs

Weaknesses

CWE-908 Use of Uninitialized Resource

Affected Products

Product	Versions
OpenThreadsilabs.com	2.5.0 through 2.5.2Affected 2.6.0 through 2.6.2Affected 2.4.6 and earlierAffected

References

https://github.com/SiliconLabs/simplicity_sdk/releasesrelease-notes
https://github.com/SiliconLabs/gecko_sdk/releasesrelease-notes
https://community.silabs.com/069Vm00000SNyueIADvendor-advisorypermissions-required

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