CVE-2025-14547 identifies an integer underflow vulnerability categorized under CWE-191 in Silicon Labs' Simplicity SDK, affecting the PSA Crypto and SE Manager EC-JPAKE APIs during the parsing of zero-knowledge proofs (ZKP). The flaw arises when an integer value unexpectedly wraps around due to underflow, causing the system to misinterpret data sizes or indices. This leads to a hard fault in the device's processor, which triggers a temporary denial of service by crashing or halting the affected component. The vulnerability requires low privileges (PR:L) but no user interaction (UI:N), and it can be exploited remotely (AV:N) without the need for complex attack vectors. The CVSS 4.0 vector reflects a low severity score of 2.3, primarily because the impact is limited to availability and is temporary, with no direct compromise of confidentiality or integrity. The affected product, Simplicity SDK, is widely used in embedded systems and IoT devices developed by Silicon Labs, which are common in industrial, consumer, and smart home environments. No public exploits or patches are currently available, indicating the need for vigilance and proactive mitigation by users of the SDK. The vulnerability highlights the importance of robust input validation and error handling in cryptographic protocol implementations, especially in resource-constrained embedded environments.

The primary impact of CVE-2025-14547 is a temporary denial of service caused by a hard fault triggered through an integer underflow during ZKP parsing. This can disrupt the normal operation of embedded devices relying on Silicon Labs' Simplicity SDK, potentially affecting availability of critical functions in IoT, industrial control, or consumer devices. While the vulnerability does not directly compromise confidentiality or integrity, repeated exploitation could degrade system reliability and availability, leading to operational interruptions. Organizations deploying affected devices in sensitive environments may face increased downtime or require manual resets, impacting service continuity. The low CVSS score reflects the limited scope and impact, but the risk is non-negligible in contexts where device availability is critical. Since no known exploits exist, the immediate threat is low, but the potential for future exploitation remains if patches are not applied promptly once available.

To mitigate CVE-2025-14547, organizations should first monitor Silicon Labs' official channels for patches or updates addressing the integer underflow in the Simplicity SDK. In the absence of patches, developers should implement additional input validation and boundary checks when handling ZKP data to prevent underflow conditions. Employing runtime monitoring to detect and recover from hard faults can reduce downtime. Where feasible, isolate affected components to limit the impact of a DoS condition. Security teams should audit firmware versions and configurations to identify vulnerable devices and consider firmware rollbacks or temporary disabling of affected APIs if possible. Incorporating redundancy and failover mechanisms in critical systems can mitigate availability risks. Finally, coordinate with Silicon Labs support for guidance and participate in vulnerability disclosure programs to stay informed.