ARM Neoverse N2

Use of Hardware Page Aggregation (HPA) and Stage-1 and/or Stage-2 translation on Cortex-A77, Cortex-A78, Cortex-A78C, Cortex-A78AE, Cortex-A710, Cortex-X1, Cortex-X1C, Cortex-X2, Cortex-X3, Cortex-X4, Cortex-X925, Neoverse V1, Neoverse V2, Neoverse V3, Neoverse V3AE, Neoverse N2 may permit bypass of Stage-2 translation and/or GPT protection.

Published: 2024-12-10T13:55:44.488Z
Updated: 2024-12-16T13:10:13.630Z

Spectre BHB is a variant of Spectre-v2 in which malicious code uses the shared branch history (stored in the CPU BHB) to influence mispredicted branches in the victim's hardware context. Speculation caused by these mispredicted branches can then potentially be used to cause cache allocation, which can then be used to infer information that should be protected.

Published: 2022-03-09T18:17:28.000Z
Updated: 2024-08-03T04:36:06.904Z

Certain Arm Cortex and Neoverse processors through 2022-03-08 do not properly restrict cache speculation, aka Spectre-BHB. An attacker can leverage the shared branch history in the Branch History Buffer (BHB) to influence mispredicted branches. Then, cache allocation can allow the attacker to obtain sensitive information.

Published: 2022-03-12T23:57:21.000Z
Updated: 2024-08-03T03:59:23.170Z

Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.

Published: 2018-01-04T13:00:00.000Z
Updated: 2026-05-28T18:00:56.175Z