CVE-2025-37948

In the Linux kernel, the following vulnerability has been resolved:

arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs

A malicious BPF program may manipulate the branch history to influence what the hardware speculates will happen next.

On exit from a BPF program, emit the BHB mititgation sequence.

This is only applied for 'classic' cBPF programs that are loaded by seccomp.

Adds missing Spectre-BHB mitigation for cBPF programs on ARM64. The security impact is limited, because this is Low-risk side-channel vector: no direct exploit, but mitigates theoretical data leaks from seccomp-loaded filters.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.