An application can be configured to block boot attempts after consecutive tamper resets are detected, which may not occur as expected. This is possible because the TAMPERRSTCAUSE register may not be properly updated when a level 4 tamper event (a tamper reset) occurs. This impacts Series 2 HSE-SVH devices, including xG23B, xG24B, xG25B, and xG28B, but does not impact xG21B. To mitigate this issue, upgrade to SE Firmware version 2.2.6 or later.

An unauthenticated IEEE 802.15.4 'co-ordinator realignment' packet can be used to force Zigbee nodes to change their network identifier (pan ID), leading to a denial of service. This packet type is not useful in production and should be used only for PHY qualification.

In a Silicon Labs  multi-protocol gateway, a corrupt pointer to buffered data on a multi-protocol radio co-processor (RCP) causes the OpenThread Border Router(OTBR) application task running on the host platform to crash, allowing an attacker to cause a temporary denial-of-service.

A bug exists in the API, mesh_node_power_off(), which fails to copy the contents of the Replay Protection List (RPL) from RAM to NVM before powering down, resulting in the ability to replay unsaved messages. Note that as of June 2024, the Gecko SDK was renamed to the Simplicity SDK, and the versioning scheme was changed from Gecko SDK vX.Y.Z to Simplicity SDK YYYY.MM.Patch#.

Malformed S2 Nonce Get command classes can be sent to crash the gateway. A hard reset is required to recover the gateway.

Malformed Device Reset Locally command classes can be sent to temporarily deny service to an end device. Any frames sent by the end device will not be acknowledged by the gateway during this time.