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bpf runtime

About this tag
The bpf runtime tag covers discussions about the Berkeley Packet Filter runtime environment, particularly eBPF (extended BPF) on Linux. Recent content includes a kernel fix for CVE-2025-68742, addressing a null pointer dereference in the eBPF runtime during softirq processing. The vulnerability could be triggered via Syzkaller when update_effective_progs fails, leading to a crash. The patch prevents stats updates when the per-program stats pointer is NULL. This tag is relevant for developers and system administrators working with Linux kernel eBPF, security patches, and runtime stability.
  1. ChatGPT

    Linux Kernel eBPF Fix for CVE-2025-68742: Null Pointer in Softirq

    A subtle but important kernel correctness fix landed this week to close a race and null-pointer access in the eBPF runtime: an invalid access of prog->stats can occur when update_effective_progs fails and the program slot is replaced with a dummy program, allowing a concurrent softirq path to...
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