operating system

Meet Fractal, an OS made for microarchitecture reverse engineering

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Meet Fractal, an OS made for microarchitecture reverse engineering 2026-05-22 at 12:17 By Sinisa Markovic Probing how a CPU isolates user code from kernel code is messy work. Researchers patch kernels, write drivers, or boot stripped-down bare-metal programs, and any of those choices change variables they were trying to hold still. Fractal, a new operating […]

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Debian 13.5 point release lands with security fixes, bug patches

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Debian 13.5 point release lands with security fixes, bug patches 2026-05-18 at 01:03 By Anamarija Pogorelec Debian 13.5 is the fifth point release for the stable distribution “trixie.” The update folds in roughly 100 Debian Security Advisories and corrections for more than 130 source packages, covering everything from the Linux kernel and Apache HTTP Server

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Rocky Linux launches opt-in security repository for urgent fixes

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Rocky Linux launches opt-in security repository for urgent fixes 2026-05-15 at 14:32 By Sinisa Markovic Rocky Linux has introduced a Security Repository that allows the distribution to ship urgent security fixes ahead of upstream Enterprise Linux when public exploit code exists and upstream patches are unavailable. “The repository is disabled by default. That’s intentional. The

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Fedora Hummingbird brings the container security model to a Linux host OS

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Fedora Hummingbird brings the container security model to a Linux host OS 2026-05-13 at 02:05 By Anamarija Pogorelec Container image security pipelines have spent the past several years pushing toward minimal footprints, hermetic builds, and continuous CVE remediation. The Fedora Project is now applying that same approach to the host operating system. At Red Hat

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Linux developers weigh emergency “killswitch” for vulnerable kernel functions

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Linux developers weigh emergency “killswitch” for vulnerable kernel functions 2026-05-11 at 16:48 By Zeljka Zorz Linux kernel developers are reviewing a proposal for an emergency risk mitigation mechanism (“Killswitch”) that would allow administrators to disable vulnerable kernel functions at runtime. The proposal, submitted by Linux kernel developer/maintainer Sasha Levin, arrives in the wake of the

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Ubuntu 26.04 LTS delivers memory-safe system tools and live patching for Arm servers

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Ubuntu 26.04 LTS delivers memory-safe system tools and live patching for Arm servers 2026-04-24 at 11:27 By Mirko Zorz Linux distributions have spent the past few years absorbing GPU vendor toolchains, Rust-based system components, and more stringent encryption defaults. Ubuntu 26.04 LTS, codenamed Resolute Raccoon, pulls most of those threads together into a single release

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Android 17 Beta 4 arrives with post-quantum cryptography and new memory limits

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Android 17 Beta 4 arrives with post-quantum cryptography and new memory limits 2026-04-17 at 09:24 By Sinisa Markovic Google shipped Android 17 Beta 4 on April 16, marking the last scheduled beta in the Android 17 release cycle. The build targets app compatibility testing and platform stability ahead of the final release, and it carries

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The fully free Linux OS Trisquel gets a major update with version 12.0 Ecne

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The fully free Linux OS Trisquel gets a major update with version 12.0 Ecne 2026-04-13 at 02:01 By Anamarija Pogorelec Trisquel GNU/Linux, a free operating system aimed at home users, small enterprises, and educational centers, released version 12.0. The release, codenamed Ecne, is declared production-ready and builds on the previous version, Aramo, with changes to

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Immutable Linux distribution Nitrux 6.0.0 adds GPU passthrough, boot-level recovery, C++ update system

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Immutable Linux distribution Nitrux 6.0.0 adds GPU passthrough, boot-level recovery, C++ update system 2026-03-04 at 09:38 By Anamarija Pogorelec Nitrux 6.0.0, released March 3, 2026, packages several components that security practitioners running Linux workstations will find worth examining: a new hypervisor orchestrator with IOMMU-enforced isolation, a rewritten update system with cryptographic verification, and a recovery

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Android 17 second beta expands privacy controls for contacts, SMS and local networks

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Android 17 second beta expands privacy controls for contacts, SMS and local networks 2026-02-27 at 14:30 By Anamarija Pogorelec Google’s second beta of Android 17 continues updates to platform behavior and introduces new APIs focused on protecting sensitive data. Protecting contact and local network data A new system-level Contacts Picker gives apps temporary access only

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Microsoft launches LiteBox, a security-focused open-source library OS

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Microsoft launches LiteBox, a security-focused open-source library OS 2026-02-05 at 11:29 By Anamarija Pogorelec Microsoft has released LiteBox, a project intended to function as a security-focused library OS that can serve as a secure kernel for protecting a guest kernel using virtualization hardware. LiteBox was developed in collaboration with the Linux Virtualization Based Security (LVBS)

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Ubuntu 24.10 Oracular Oriole brings tighter security controls

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Ubuntu 24.10 Oracular Oriole brings tighter security controls 2024-10-11 at 10:16 By Help Net Security Canonical released Ubuntu 24.10 Oracular Oriole, which brings notable advancements, including an updated kernel, new toolchains, and the GNOME 47 desktop environment, along with significant enhancements in software security. “Oracular Oriole sets a new pace for delivering the latest upstream

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OpenBSD 7.6 released: security improvements, new hardware support, and more!

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OpenBSD 7.6 released: security improvements, new hardware support, and more! 2024-10-08 at 21:01 By Help Net Security OpenBSD is a free, multi-platform 4.4BSD-based UNIX-like operating system. The 57th release, OpenBSD 7.6, comes with new features, various improvements, bug fixes, and tweaks. Security improvements Added -fret-clean option to the compiler, defaulting to off. This new option

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Inside the book: Androids – The Team That Built the Android Operating System

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Inside the book: Androids – The Team That Built the Android Operating System 2024-02-29 at 07:03 By Help Net Security In 2004, Android was two people who wanted to build camera software but couldn’t get investors interested. Android is a large team at Google today, delivering an OS to over 3 billion devices worldwide. In

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Tails 5.2.0 comes with several improvements, updated Tor Browser

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Tails 5.2.0 comes with several improvements, updated Tor Browser 29/11/2023 at 13:33 By Help Net Security Tails is a portable operating system that protects against surveillance and censorship. Tails can be installed on any USB stick with a minimum of 8 GB. Tails works on most computers under ten years old. You can start again

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Baseline standards for BYOD access requirements

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Baseline standards for BYOD access requirements 07/09/2023 at 06:02 By Help Net Security 49% of enterprises across Europe currently have no formal Bring-Your-Own-Device (BYOD) policy in place, meaning they have no visibility into or control over if and how employees are connecting personal devices to corporate resources, according to a Jamf survey. With the summer

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The power of passive OS fingerprinting for accurate IoT device identification

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The power of passive OS fingerprinting for accurate IoT device identification 31/08/2023 at 07:31 By Help Net Security The number of IoT devices in enterprise networks and across the internet is projected to reach 29 billion by the year 2030. This exponential growth has inadvertently increased the attack surface. Each interconnected device can potentially create

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