Succinct's SP1 ZKVM (zero-knowledge virtual machine) has been found to have a critical security vulnerability by LambdaClass. The vulnerability, discovered in version 3 of SP1, resulted from the interaction of two separate security flaws. While Succinct quickly addressed the issue, concerns have been raised about transparency in security practices for ZKVMs. The exploit depends on the interplay between the two issues, making it necessary to fix both to prevent exploitation. LambdaClass felt compelled to make the disclosure public due to a perceived lack of urgency in Succinct's communication about the issue. Avail's Anurag Arjun stated that better public disclosure practices are needed in the ZKVM space. Succinct has released an updated version, Turbo, which resolves the vulnerability. The incident highlights the presence of bugs even in well-audited code and raises questions about the balance between security, transparency, and user protection.



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