Top all-time · #5092
Cyberus Technology
Company blog · cyberus-technology.de/articlessystemssecurity
Cyberus Technology is the company blog at cyberus-technology.de, writing about systems and security. Since 2019, 15 different Hacker News readers have linked it 31 times, most often “ZombieLoad: Cross Privilege-Boundary Data Leakage on Intel CPUs”. No feed was found, so read it on the site itself.
Too few sampled comments (11) to say how often HN recommends it.?
Why HN links it
HN readers link Cyberus Technology's 2019 ZombieLoad write-up, a technical post on Intel CPU data-leak flaws, as the best high-level overview of the topic. Other links point to their hypervisor product pages.
Summarised by Claude from a sample of 11 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Open source infrastructure for digital sovereignty. BSI-approved hypervisor, Cyberus Linux, and automated testing for regulated environments.
Most-linked posts?
- ZombieLoad: Cross Privilege-Boundary Data Leakage on Intel CPUs5 people · 6 mentions · first linked 2019-05-14
- Graphics Virtualization Support in KVM Back End for VirtualBox3 people · 3 mentions · first linked 2024-03-08
- /products/hypervisor2 people · 3 mentions · first linked 2024-02-08
What Hacker News says?
In short: * Core and Xeon CPUs affected, others apparently not. * HT on or off, any kind of virtualization, and even SGX are penetrable. * Not OS-specific, apparently. * Sample code provided. https://www.cyberus-technology.de/posts/2019-05-14-zombieloa...
Comment linking /posts/2019-05-14-zombieload.html
on “ZombieLoad: Cross Privilege-Boundary Data Leakage on Intel CPUs”Submitted ZombieLoad: Cross Privilege-Boundary Data Leakage on Intel CPUs as a story · 854 points
HN discussionWith this version of VBox, it's quite possble to pass a GPU to the VM. Have a look at https://www.cyberus-technology.de/products/hypervisor if you want to see a demo.
Comment linking /products/hypervisor
on “VirtualBox KVM Public Release”Submitted VirtualBox KVM Public Release as a story · 520 points
HN discussionThere is experimental support for VFIO PCI pass-through with VirtualBox-KVM, even for GPUs. Please have a look at https://www.cyberus-technology.de/products/hypervisor
Comment linking /products/hypervisor
on “VirtualBox KVM Public Release”Submitted Graphics Virtualization Support in KVM Back End for VirtualBox as a story · 48 points
HN discussionYou can also setup VFIO in VirtualBox/KVM. We haven't polished it yet though. You can check the video here to see GPU virtualization in action: https://www.cyberus-technology.de/products/hypervisor (Don't mind the English, we are not native speakers. :)
Comment linking /products/hypervisor
on “VirtualBox KVM Public Release”Submitted Graphics Virtualization Support in KVM Back End for VirtualBox as a story · 13 points
HN discussionThis is the overview page. It comes alongside: * https://zombieloadattack.com/ , on Hacker News as https://news.ycombinator.com/item?id=19911341 (The technical paper is hidden inside a collapsed part of the page and is at https://www.cyberus-technology.de/posts/2019-05-14-zombieloa... .) * https://mdsattacks.com/ , on Hacker News at https://news.ycombinator.com/item?id=19911277 * Google's announcement about ChromeOS…
Comment linking /posts/2019-05-14-zombieload.html
on “CPU.fail”Submitted Cyberus Technology is hiring a Business Development Manager (m/f/d) as a story · 4 points
HN discussionThe blog post is buried a bit deep, but has the actual technical information on the topic https://www.cyberus-technology.de/posts/2019-05-14-zombieloa...
Comment linking /posts/2019-05-14-zombieload.html
on “CPU.fail”Submitted The Case for Legacy Software as a story · 4 points
HN discussionCyberus Technology | https://cyberus-technology.de | Software Engineer | REMOTE (Germany, Spain, Canada) | Full-time Our mission is to build open-source digital infrastructure that stands the test of time. We engineer modular, transparent and reproducible software that “just works,” empowering organisations to run critical systems safely for decades. Guided by science, data and a deep respect for democracy and human…
Comment linking /
on “Ask HN: Who is hiring? (July 2025)”Submitted Simplifying OpenStack Deployment with NixOS: Introducing Openstack-Nix as a story · 3 points
HN discussionhttps://github.com/cyberus-technology/virtualbox-kvm I learned of it via: https://news.ycombinator.com/item?id=39300317 Also interesting: vgpu suport (intel srv-io) https://cyberus-technology.de/articles/vbox-kvm-sriov
Comment linking /articles/vbox-kvm-sriov
on “Proxmox VE: Import Wizard for Migrating VMware ESXi VMs”Submitted Commercial Long Term NixOS Support as a story · 3 points
HN discussionDirect link to the bugs' central webpage, which is far more informative than this article: https://cpu.fail/ Included are the papers describing each exploit as well as links to PoC repositories. Edit: here's a link to the blog describing ZombieLoad, which is perhaps the best high-level overview: https://www.cyberus-technology.de/posts/2019-05-14-zombieloa...
Comment linking /posts/2019-05-14-zombieload.html
on “New secret-spilling flaw affects almost every Intel chip since 2011”Submitted VirtualBox-KVM Technical Details and Update as a story · 3 points
HN discussionThis comes alongside: * The overview page https://cpu.fail/ , on Hacker News as https://news.ycombinator.com/item?id=19911715 * https://zombieloadattack.com/ , on Hacker News as https://news.ycombinator.com/item?id=19911341 (The technical paper is hidden inside a collapsed part of the page and is at https://www.cyberus-technology.de/posts/2019-05-14-zombieloa... .) * https://mdsattacks.com/ , on Hacker News at https…
Comment linking /posts/2019-05-14-zombieload.html
on “Google Disables Intel Hyperthreading on ChromeOS”Submitted Cyberus Technology is hiring a Full-Stack Software Engineer (m/f/d) in Rust as a story · 2 points
HN discussionEU-origin software used by EU public sector: https://www.secunet.com/en/products-consulting/sina > The first building block was securely encrypted communication via the internet, followed by secure laptops for government employees. Today, SINA forms an integrated ecosystem of applications, computers, network encryption and a cloud platform. With over 250,000 active devices, SINA has established itself as the de fact…
Comment linking /en/products/hypervisor
on “Europen Union creates Fedora-based Linux distribution for the public sector”Submitted KVM Nested Virtualization Bug Hunting as a story · 2 points
HN discussionCyberus Technology/ Software engineer (m/f/d)/ Dresden, Germany/ Full-Time/ Permanent remote possible/ https://www.cyberus-technology.de/ Cyberus Technology GmbH is a 2017 founded company lead by engineers and information scientists, who offer an innovative virtualization and test automation solution for IT security. We are 25 people spread all over Germany, with offices in Dresden and Braunschweig. We are mostly en…
Comment linking /
on “Ask HN: Who is hiring? (February 2023)”Submitted Nested Virtualization for the KVM Back End for VirtualBox as a story · 2 points
HN discussionAt Cyberus Technology, we've built openstack-nix, a NixOS-based solution that makes deploying and testing OpenStack more reliable and reproducible. It lets you spin up a complete OpenStack setup with a single command, run tests inside NixOS VMs, and customize configurations effortlessly. No more dependency headaches or cumbersome hardware setups - just clean, modular OpenStack deployments. Curious? Here's how we did…
Comment linking /en/articles/simplifying-openstack-with-nixos
on “Simplifying OpenStack Deployment with NixOS: Introducing Openstack-Nix”Submitted The Hedron Hypervisor as a story · 2 points
HN discussionCheck out our latest blog post, "VirtualBox KVM Technical Deep-Dive," where we unveil the inner workings of our newly released VirtualBox KVM variant on GitHub. Explore the replacement of the original VirtualBox kernel module with a KVM hypervisor backend for Linux. Dive into the technical details and discover how we optimized performance, especially for Windows guests: https://cyberus-technology.de/articles/vbox-kv…
Comment linking /articles/vbox-kvm-deep-dive?utm_source=hackernews&utm_medium=social&utm_campaign=blog
on “VirtualBox-KVM Technical Details and Update”Submitted ZombieLoad: Cross Privilege-Boundary Data Leakage on Intel CPUs as a story · 2 points
HN discussionSubmitted Cyberus Technology is hiring a Infra and Ops Engineer (Rust / NixOS) (m/with d) as a story · 1 points
HN discussionSubmitted Simplify Your SR-IOV Setup: A Guide to NixOS Modules and Specialisations as a story · 1 points
HN discussion
