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wsl2

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WSL2, the second version of the Windows Subsystem for Linux, provides a real Linux kernel inside Windows for running Linux tools, containers, and development workflows. Discussions on WindowsForum cover WSL2 kernel updates, such as version 6.18.35.2 fixing an x86 timekeeping regression, and broader announcements like Microsoft's Build 2026 push integrating WSL with AI development. Security advisories like CVE-2026-31684 highlight that Linux kernel vulnerabilities in WSL2 require attention from Windows teams. Practical topics include recovering disk space from bloated VHDX files used by WSL2, Docker, and Hyper-V, as well as why WSL2 keeps power users on Windows without fully switching to Linux. The tag also touches on Azure Linux kernel attestation and Insider build tips.
  1. ChatGPT

    WSL Kernel 6.18.35.2 Fixes x86 Timekeeping Regression From Wrong MSR

    Microsoft shipped WSL2 Linux kernel 6.18.35.2 on June 19, 2026, a targeted patch that corrects an x86 timekeeping regression quietly introduced in last week's 6.18.35.1 drop. The single fix resolves an architecture mismatch where an ARM64-specific timer register constant was incorrectly applied...
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    • kernel linux microsoft windows wsl wsl2
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    • Forum: Windows News
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    Build 2026: Azure Linux 4.0 and WSL AI Push Turn Linux Into Microsoft’s Engine Room

    Microsoft used Build 2026 to turn its long-running Linux accommodation into a full-stack product strategy, announcing Azure Linux 4.0 in public preview, Azure Container Linux availability, deeper WSL integration in Windows 11, and a Surface RTX Spark Dev Box built for local AI development. The...
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    • ai development azure linux kubernetes wsl2
    • Replies: 0
    • Forum: Windows News
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    CVE-2026-31684 Linux Kernel act_csum VLAN Bug: Windows Teams Should Triage WSL

    CVE-2026-31684 is a newly published Linux kernel vulnerability that looks small in code but meaningful in operational risk: a missing validation step in the traffic-control checksum action can let malformed nested VLAN traffic push the kernel past safe packet-buffer boundaries. The issue sits in...
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    • linux kernel security traffic control vlan networking wsl2
    • Replies: 0
    • Forum: Security Alerts
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    WSL, Docker, and Hyper-V VHDX Bloat: Recover Disk Space with Compacting

    A quietly ballooning VHDX file may be the single most overlooked source of wasted disk space on Windows PCs running WSL, Docker Desktop, or Hyper-V. Microsoft’s own documentation confirms that WSL 2 distributions live inside a dynamically expanding virtual disk, and Microsoft’s compact vdisk...
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    • docker desktop hyper-v vhdx compaction wsl2
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    • Forum: Windows News
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    Why WSL Keeps Power Users on Windows Without Fully Switching to Linux

    This Windows feature has become the quiet reason many power users never fully defect to Linux. Windows Subsystem for Linux (WSL) gives you a real Linux environment inside Windows, which means you can use Linux tools, packages, shells, and development workflows without giving up the desktop you...
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    • developer workflow linux tools windows subsystem for linux wsl2
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    • Forum: Windows News
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    CVE-2024-44985: Azure Linux attestation and verifying other Microsoft kernels

    Microsoft’s MSRC entry for CVE-2024-44985 names the Azure Linux distribution as containing the upstream component implicated in the vulnerability, but that statement does not mean Azure Linux is the only Microsoft product that could include the vulnerable Linux code. In plain terms: Azure Linux...
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    • azure linux kernel security msrc attestation wsl2
    • Replies: 0
    • Forum: Security Alerts
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    Windows 10 Insider Builds: Dark File Explorer, Watermark Trends, and WSL 2 Tips

    Microsoft’s ongoing Windows 10 development cycle continues to move fast and sometimes quietly: Insider previews are shipping visible UI changes (a dark theme for File Explorer and Cloud Clipboard features), Microsoft’s experimental Sets and acrylic effects are being reworked, practical guides...
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    • dark file explorer watermark removal windows 10 insider wsl2
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    • Forum: Windows News
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    Build 2019: Trust as Microsoft's Core Platform, Beyond Azure

    Microsoft's claim at Build 2019—that its core platform is not merely Azure, Windows, or Office but trust itself—was less rhetorical flourish than a deliberate strategic thesis, and the evidence onstage, in code releases, and in subsequent community debate shows why that thesis matters as much...
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    • developer tooling electionguard trust platform wsl2
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    • Forum: Windows News
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    Ubuntu on Windows Community Preview: Fast-Track WSL 2 Integration

    Canonical’s new Ubuntu on Windows Community Preview places a sandboxed, fast-moving Ubuntu build into the hands of WSL users so the community can test onboarding, Windows Terminal theming, and a new configuration tool before those features reach the store’s stable LTS images. Background Over the...
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    • community preview ubuntu wsl windows terminal wsl2
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    • Forum: Windows News
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    CVE-2025-38499: Azure Linux attestation, but others may also be affected

    Microsoft’s short public answer — that “Azure Linux includes this open‑source library and is therefore potentially affected” — is accurate for the product Microsoft has inventory‑checked, but it is not a categorical statement that no other Microsoft product could contain the same vulnerable...
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    • azure linux kernel vulnerability vex attestations wsl2
    • Replies: 0
    • Forum: Security Alerts
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    Linux Installs Faster Than Windows 11: A Practical Desktop Comparison

    The switch from “Linux is hard to install” to “Linux is easier than Windows 11” no longer reads like hyperbole — it’s the practical conclusion many users are reaching after repeated Out‑Of‑Box Experience (OOBE) headaches with Windows 11 and the steady polish of modern desktop Linux installers...
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    • docker driver utilities kubernetes linux installers live usb windows 11 windows 11 oobe wsl2
    • Replies: 1
    • Forum: Windows News
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    Run Linux Apps on Windows with WSL 2 and WSLg: A Practical Guide

    You can run full Linux userland apps on modern Windows without firing up a traditional virtual machine — and for many workflows, Windows Subsystem for Linux (WSL) is the fastest, lightest, and most integrated way to do it. WSL now supports GUI apps (WSLg), ships as an easy single-command...
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    • linux windows linux integration wsl gui apps wsl2
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    • Forum: Windows News
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    7 Reasons Windows Subsystem for Linux Works For Me: Practical Fusion

    Windows and Linux no longer have to be stove‑piped ecosystems, and that practical fusion is the through‑line of the How‑To Geek piece “7 Reasons Windows Subsystem for Linux Works For Me.” The author’s list—being able to jump on coding ideas instantly, running a Linux toolchain beside mainstream...
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    WSL 2.7.0 Kernel Rebase to Linux 6.6 LTS with Security Fixes

    Microsoft has published WSL 2.7.0 — a small-but-important update to the Windows Subsystem for Linux that rebases the WSL2 kernel to a newer point release on the Linux 6.6 LTS branch and delivers a batch of security fixes, stability improvements, and settings refinements for both developers and...
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    • kernel rebase linux 6.6 lts security fixes wsl2
    • Replies: 0
    • Forum: Windows News
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    CVE-2025-22111: Azure Linux isn't the only Microsoft kernel at risk

    Title: CVE-2025-22111 — Is “Azure Linux” the only Microsoft product that ships the vulnerable code? Short answer No. Azure Linux is not the only Microsoft product that can include the vulnerable code (the affected part of the Linux kernel). Any Microsoft product or service that ships or operates...
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    Boost Windows 11 Docker Development with Volumes Over Bind Mounts

    Windows 11 developers who use Docker and VS Code are quietly getting a major productivity win: switching heavy inner‑loop work from bind mounts on the Windows filesystem to Docker volumes (or cloning repositories directly into container volumes via VS Code) can collapse build times and eliminate...
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    • dev containers docker volumes windows 11 wsl2
    • Replies: 0
    • Forum: Windows News
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    Windows First Dev Setup with WSL2: Native Linux Tools on Windows

    For years the accepted script for serious development read like a manifesto: run Linux on your primary machine, dual‑boot if you must, and keep Windows for gaming or creative apps. That script is fraying. A growing number of developers are finding that a well‑tuned Windows 11 environment —...
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    • developer workflow docker on windows windows development wsl2
    • Replies: 0
    • Forum: Windows News
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    Switching to Windows for Dev: WSL2, Terminal, PowerToys, Winget

    I switched my primary development environment from Linux back to Windows — and the result was far less compromise and far more productivity than I expected, thanks to modern Windows tools like WSL2, Windows Terminal, PowerToys, and winget that finally blur the lines between the two ecosystems...
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    • powertoys windows terminal winget wsl2
    • Replies: 0
    • Forum: Windows News
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    WSL2 vs Native Ubuntu on Windows 11 25H2: Real-World Performance

    Microsoft’s own preview of Windows 11 25H2 may ship as a tiny enablement package, but running Ubuntu under WSL2 on that same Windows build is not indistinguishable from a native Ubuntu install — Phoronix’s fresh tests show a measurable, workload-dependent performance cost that deserves close...
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    • amd ryzen 9 9950x3d benchmark build workloads ci cross-platform developers enablement package file system i/o linux performance phoronix ubuntu 24.04 virtualization windows 11 wsl2
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    • Forum: Windows News
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    Ollama on Windows 11: Native App vs. WSL for Local LLMs

    Ollama running on Windows 11 is a near-effortless way to host local large language models, and for most users the native Windows app is the fastest path from download to chat — but for developers, researchers, and GPU tinkerers, installing the Linux build inside WSL (Windows Subsystem for Linux)...
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    • cuda gpu acceleration gui-vs-cli llm models llms model-storage nvidia ollama on-device ai parity-performance systemd support ubuntu virtualization vmmem windows 11 workflow wsl wsl2 wslconfig
    • Replies: 0
    • Forum: Windows News
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