❌

Reading view

↗️

Google pays $250K for Linux vulnerability allowing guest VM escapes

✇Ars Technica - Technology
By: Dan Goodin

A Linux vulnerability that allows untrusted virtual machines to gain root access to host machines is one of two high-severity flaws to surface this week in the open source operating system.

The vulnerability resides in KVM, which is, in essence, a virtual machine app included in the kernel of many Linux distributions. The vulnerability, tracked as CVE-2026-53359, allows guest virtual machines—such as those used in cloud platforms to isolate one user’s instance from the host OS and other user instances—to break out of that container.

Januscape: A threat to cloud platforms

The vulnerability affects KVM running on both AMD and Intel processors. It exploits bugs residing in the KVM guest-side, the portion of the VM that consists of only resources like the OS or drivers present in the guest VM, rather than resources present on the host machine. The threat went unnoticed in the Linux kernel for 16 years.

Read full article

Comments

© Getty Images

  •  
  • ↗️
↗️

Razões que explicam por que o Debian continua tão respeitado

✇Blog do Edivaldo
By: Edivaldo Brito

O sistema operacional Debian Linux é referência em estabilidade, segurança e liberdade de software. Descubra por que ele ainda é tão respeitado.

O post Razões que explicam por que o Debian continua tão respeitado apareceu primeiro em Blog do Edivaldo - Informações e Notícias sobre Linux.

  •  
  • ↗️
↗️

O Debian está mais moderno do que muita gente imagina

✇Blog do Edivaldo
By: Edivaldo Brito

Debian Linux e Debian desktop são robustos e modernos. Descubra por que eles são escolhas sólidas para usuários que buscam estabilidade e inovação.

O post O Debian está mais moderno do que muita gente imagina apareceu primeiro em Blog do Edivaldo - Informações e Notícias sobre Linux.

  •  
  • ↗️
↗️

High-severity vulnerability in Linux caused by a single faulty character

✇Ars Technica - Technology
By: Dan Goodin

Researchers have analyzed a high-severity vulnerability in Linux that’s able to escalate untrusted users to root by exploiting a bug you don't often see: a single errant character inside the kernel.

The vulnerability, tracked as CVE-2026-23111, is located in nf_tables, a subsystem of the Linux kernel that provides packet filtering capabilities. It’s used to manage firewall rules and replaces older subsystems such as iptables, ip6tables, arptables, and ebtables.

!!!WTF!!!

The presence of a single mis-issued exclamation point in code implementing nf_tables introduced a use-after-free, a class of vulnerability that corrupts memory by placing malicious code at memory addresses that haven’t been properly freed of their previous contents. CVE-2026-23111 can be exploited by an unprivileged user or process to elevate system rights to root.

Read full article

Comments

© Getty Images

  •  
  • ↗️
↗️

Microsoft makes Linux developers feel more at home in Windows with Coreutils release

✇Computerworld

Microsoft has announced Coreutils, a new Windows 11 feature that allows developers to run many popular Linux command line utilities natively on Windows from a single binary.

Revealed at this week’s Build 2026 developer conference in Seattle, Coreutils is about reducing what Microsoft terms the “cognitive load” faced by developers when moving between Windows and other platforms.

Currently, accessing the Linux command line utilities that are considered essential in many CI/CD development environments on Windows requires a kludge that involves either opening an emulation such as Git Bash, or a virtualized Windows Linux Subsystem (WSL) terminal.

Both are time-consuming and inefficient. As Microsoft’s announcement puts it: “Developers constantly move between platforms, but familiar commands don’t work consistently, forcing workarounds, lost speed and context switching.”

Coreutils removes the need for this back and forth, allowing developers to run most Linux commands straight from the Windows CMD command prompt, PowerShell, or Windows Terminal.

“Whether you’re moving between Linux, macOS, WSL, containers or cloud environments, the commands and workflows you’ve built over years just work in your Windows environment,” Microsoft said.

Most utilities, but not all

Installed as a single executable (via WinGet: install Microsoft.Coreutils), Coreutils for Windows itself is a Rust rewrite of the GNU uutils/coreutils project that provides commands that are universal across Linux distros.

Fundamental to making Coreutils efficient to manage is the fact that individual Linux commands run from a multi-call executable which maps via NTFS hardlinks pointing to each command. The advantage of this approach is that there’s only one binary to install, one binary to sign, and one binary to patch or update.

Microsoft lists 75 Linux utilities supported by Coreutils, including commonly-used commands such as ls, cp, find, grep, find, rm, du, hostname, and uptime.

However, some Coreutils commands clash with existing CMD or Powershell commands, or are otherwise not possible to execute; Microsoft provides a compatibility table listing conflicts. This means that some commands are not available, specifically: dir, expand, kill, more, timeout, and whoami.

There are also some commands omitted from Coreutils because a command relies on a POSIX Unix/Linux feature that Windows doesn’t implement in a compatible way; some examples are chmod, chown, id, stty, and chroot.

In other cases, the command will execute in one context, CMD, but not in PowerShell. Microsoft explained the complex order of precedence:  “Whether the Coreutils version runs depends on the shell, the PATH order, and (for PowerShell) the alias table.”

As well as Coreutils, the Build 2026 developer conference also saw Microsoft announce WSL containers CLI and API to deploy Linux containers on Windows, a new framework for autonomous agents with open source governance tools, and Microsoft Scout, an AI agent designed to automate tasks in Microsoft 365.

This article originally appeared on InfoWorld.

  •  
  • ↗️
❌