https://wccftech.com/spectre-v2-vulnerability-strikes-again-in-intel-alder-lake-arm-cpus-amd-chips-unharmed/

VUSec security research group and Intel have revealed another Spectre-class speculative execution vulnerability called branch history injection, or BHI. The new exploit impacts all Intel processors released in the last several years and specific Arm core processors. Intel processors affected include the most recent 12th Gen Core Alder Lake CPUs. Surprisingly, AMD chips have shown no effect from the vulnerability at this time.

BHI is a proof-of-concept attack affecting vulnerable CPUs open to Spectre V2 exploits. The interesting part of this particular attack is that several mitigations were currently in place on the affected CPUs. BHI avoids the Intel Enhanced Indirect Branch Restricted Speculation (EIBRS) and the Arm ID_PFR0_EL1 CSV2 assignment. VUSec reports that BHI enables cross-privilege Spectre-v2 exploits, allowing kernel-to-kernel (intra-mode BTI) exploits and permitting attackers to place predictor entries into the global branch prediction history make kernel leak data. The result of the attack leaks arbitrary kernel memory on specific CPUs and could reveal hidden data such as passwords.