QEMU

A developer has published a walkthrough of building a minimal operating system kernel written in Swift and booting it in the QEMU emulator. The post covers getting Swift code running at the bare-metal level, a task usually associated with C or Rust, and shows it is feasible to strip Swift down for kernel-style development.

A new profile piece on programmer Fabrice Bellard is circulating among developers. Bellard is the creator of FFmpeg, QEMU, TCC and other influential software, and has broken records in computing, including calculating digits of pi. The article examines his low public profile despite his outsized impact on modern computing, prompting discussion about his work and legacy.

A new paper and proof-of-concept, "The Invisible Wire: Bidirectional Audio Covert Channels Across VM Boundaries in Default QEMU/KVM Deployments," has been published. The researchers show that with default virt-manager, SPICE, and PipeWire settings, an unprivileged host-side process can both sniff a virtual machine's audio output and inject audio into it, creating a two-way covert channel. The finding matters because it requires no custom configuration and highlights a gap in typical virtualization isolation assumptions.

Alex Bennée, Tech Lead at Linaro, has published a blog post examining what he calls the "Bugpocalypse" — a sudden influx of AI-generated bug reports in the QEMU issue tracker. He argues that while large language models are getting better at spotting potential issues, the volume and quality of machine-filed reports pose new challenges for open-source maintainers who must triage them.