arm64 bpf

The arm64 bpf tag on WindowsForum.com covers Linux kernel security mitigations related to ARM64 and BPF (Berkeley Packet Filter). A recent thread discusses CVE-2025-37963, which narrows Branch History Buffer (BHB) mitigations on ARM64 to apply only to classic BPF (cBPF) programs loaded by unprivileged users. This corrective tweak removes redundant mitigations for privileged paths while preserving defenses against speculative-execution attacks on certain Arm CPUs. The content emphasizes the operational need for administrators to patch or apply conservative kernel hardening when vendor updates are unavailable. The tag focuses on Linux kernel internals, ARM64 architecture, and BPF security, not Windows or Microsoft products.