In SiWx91x devices, the SHA2/224 algorithm returns a hash of 256 bits instead of 224 bits. This incorrect hash length triggers a software assertion, which subsequently causes a Denial of Service (DoS). If a watchdog is implemented, device will restart after watch dog expires. If watchdog is not implemented, device can be recovered only after a hard reset
The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
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https://community.silabs.com/068Vm00000I7zqo | vendor advisory permissions required |