linux networking

Linux systems picked up another networking CVE this week, and CVE-2026-31503 is a good reminder that some of the most consequential kernel bugs are not dramatic memory corruption flaws but logic failures in trusted packet paths. The issue lives in UDP bind conflict checking, where the kernel can...

The Linux networking stack is getting a small but important hardening fix that matters well beyond its one-line title. Microsoft has cataloged the issue as CVE-2026-23343, and the underlying upstream change is a Linux XDP patch that now warns when a calculated tailroom goes negative instead of...

CVE-2026-23340 has drawn attention because it sits squarely in a part of the Linux networking stack that most people never think about until something goes wrong: the qdisc layer that schedules packets before they hit a NIC. The bug is a race condition in the tx-queue shrinking path that can...

A recently assigned CVE has drawn attention to a subtle but important correctness gap between BPF test infrastructure and the Linux Generic Segmentation Offload (GSO) machinery: CVE-2025-68725 — described as “bpf: Do not let BPF test infra emit invalid GSO types to stack” — fixes a case where a...