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Linux Foundation, Linux Fu, and Linux Kernel
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Uwe Kleine-König: PGP Keysigning on Linux Plumbers and OpenSource Summit Europe 2026
I'm going to this year's LPC and Open Source Summit Europe.
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Hackaday ☛ Linux Fu: Heads Or Tails For VPN
WireGuard itself is wonderfully simple. Each peer has a public/private key pair and a list of networks reachable through the peer. The difficulty isn’t WireGuard’s cryptography; it is managing a useful network of machines that move around. Each node gets a 100.x.x.x IP address and a DNS name that allows you to talk to it over an encrypted tunnel directly (at least, usually).
Suppose your laptop is at a coffee shop, your Raspberry Pi is behind your home router, and a server is sitting in a VPS somewhere. None necessarily has a convenient fixed public address. Both of them may be behind carrier-grade NAT. Their addresses may change. Somehow they need to discover one another, exchange enough information to establish secure connections, and update that information as circumstances change.
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Himanshu Anand ☛ I found a VM escape bug in KVM and someone else got there first
I independently found a heap out-of-bounds read/write in KVM’s SEV-SNP Page State Change handler. A malicious guest VM can corrupt host kernel heap memory and leak its layout, across the VM boundary, as many times as it wants. I reported it to [email protected] on May 9, 2026 and they told me someone else reported it a few weeks earlier.
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Intel brings HDMI 2.1 FRL back to Linux: 44 new patches already enable 4K at 120 Hz
Some driver features apparently need a little longer to get off the ground. Intel had already been working on native HDMI 2.1 FRL support for Linux in 2022, but that development subsequently largely disappeared from view. On August 7, 2026, Intel’s developers returned with a new series comprising no fewer than 44 patches. The target is Meteor Lake and all newer platforms. Practical progress is already visible: According to the developers, modes such as 4K at 120 Hz work on lightly tested Panther Lake hardware. Nevertheless, the work is still far from complete. The patch series is explicitly under review, has not yet been included in the mainline kernel, and does not currently support Display Stream Compression over FRL.