A significant security vulnerability has been identified in certain RISC-V chips, posing a risk to the confidentiality of data. The Spectre vulnerability, known for its impact on speculative execution, has been found to affect commercially available out-of-order RISC-V processors.
Key Insights
The vulnerability specifically affects the SiFive P550 and T-Head Xuantie C910/C920 processors, while in-order processors like the SiFive U74 and Xuantie C906/C908 are not affected. Researchers successfully demonstrated proof-of-concept attacks using Spectre-PHT, Spectre-BTB, SpectreRSB, and Spectre-STL, underscoring the severity of the issue.
