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May 2025, VUSec released three vulnerabilities extending on Spectre-v2 in various Intel and ARM architectures under the moniker Training Solo. Mitigations require a microcode update for Intel CPUs and changes in the Linux kernel.
* The history-based attack affects all Intel CPUs with eIBRS, including the latest as of 2025, Intel's latest generation Lion Cove which features the BHI_NO feature and selected ARM microarchitectures.
* Indirect Target Selection (ITS) affects Intel Core 9th-11th generations and Intel Xeon 2nd-3rd generations.

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