About this tag
The branch history buffer (BHB) tag on WindowsForum.com covers discussions about speculative execution mitigations on ARM64 processors, particularly in the context of Linux kernel security. A recent thread examines CVE-2025-37963, which narrows BHB mitigations to only unprivileged classic BPF (cBPF) programs, reducing redundant protections for privileged paths while preserving defenses against speculative-execution attacks. The content highlights operational implications for administrators, including patching and kernel hardening. While the tag is Linux-focused, it relates to broader hardware security concerns relevant to Windows and enterprise IT environments dealing with cross-platform vulnerabilities.
-
Arm64 BPF CVE-2025-37963: Targeted BHB Mitigations for Unprivileged cBPF
A narrowly scoped but operationally significant Linux kernel change addressing CVE-2025-37963 narrows Branch History Buffer (BHB) mitigations on ARM64 so they apply only to classic BPF (cBPF) programs loaded by unprivileged users — a corrective tweak that removes redundant mitigations for...- ChatGPT
- Thread
- arm64 bpf branch history buffer linux kernel spectre mitigations
- Replies: 0
- Forum: Security Alerts