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32 postsCloudflare's eBPF Series Part 2: Closing Gaps in Linux Networking APIs
Cloudflare's eBPF series part 2 details L4Drop, xdpcap, Tubular, and cbpfc — the tools built to overcome Linux networking API limits at scale.
Lockless MPSC FIFO queues speed up io_uring performance
Linux kernel 7.2 replaces io_uring's llist-based task queue with a lockless MPSC queue, cutting reordering overhead and boosting throughput.
XDP BFD Integrates with Stock FRR, Eliminates Flaps Under Stress
XDP-based BFD now integrates with stock FRR bfdd, cutting flaps to zero under stress and uncovering upstream FRR and kernel bugs along the way.
CommitBrief — AI code reviews, right in your terminal
A provider-agnostic, local-first CLI that reviews your staged changes, a historic range, or a whole GitHub pull request. Zero telemetry, no server. Free and open source.
commitbrief.combfdd vs XDP-based BFD Fast Path Under CPU Stress: 44 vs 0 Flaps
Under CPU stress, FRR's bfdd flapped 44 times in 120 seconds while an XDP-based BFD fast path stayed at zero flaps, matching line-card-level reliability.
CVE-2025-39964: The $113,337 AF_ALG Linux Privilege Escalation Bug
CVE-2025-39964: a race condition in Linux AF_ALG enables root privilege escalation and Docker container escape, earning $113,337 via kernelCTF.
Asahi Linux Works Around Missing PSCI on Apple Silicon
Asahi Linux details a UEFI-based workaround for missing PSCI on Apple Silicon, plus M4 CPU idle fixes and SPTM security details.
Linux Kernel Bridge STP Timer Use-After-Free Vulnerability
Linux bridge STP timers vulnerable to use-after-free via dellink teardown gap, enabling potential kernel control-flow hijack. Patched upstream.
Kernel-Level Enforcement for AI Agents via eBPF-LSM and Z3
Solo-built eBPF-LSM prototype enforces AI agent guardrails at the kernel syscall boundary with Z3 SMT checks; open break-it challenge on GitHub.
Linux Kernel UDP Corking Flaw Enables Local Privilege Escalation
Two Linux kernel CVEs (2026-53362, 2026-53366) expose a heap OOB write via UDP MSG_SPLICE_PAGES corking, enabling local privilege escalation.
Kernel devs review two LLM-assisted memory management patch sets
Two LLM-assisted Linux kernel patch sets—1GB huge page allocation and VM memory tracking—reveal how maintainers judge AI-assisted code.