Hírolvasó

[$] LWN.net Weekly Edition for May 29, 2025

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Inside this week's LWN.net Weekly Edition:

  • Front: Glibc security; How we lost the Internet; Encrypted DNS; 6.15 Development statistics; Filesystem stress-testing; BPF verifier; Network access from BPF; OSPM 2025.
  • Briefs: AlmaLinux 10.0; FESCo decision overturned; NixOS 25.05; Pocket, Launchpad retired; Quotes; ...
  • Announcements: Newsletters, conferences, security updates, patches, and more.
corbet

[$] Glibc project revisits infrastructure security

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The GNU C Library (glibc) is the core C library for most Linux distributions, so it is a crucial part of the open-source ecosystem—and an attractive target for any attackers looking to carry out supply-chain attacks. With that being the case, securing the project's infrastructure using industry best practices and improving the security of its development practices are a frequent topic among glibc developers. A recent discussion suggests that improvements are not happening as quickly as some would like.

jzb

[$] Allowing BPF programs more access to the network

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Mahé Tardy led two sessions about some of the challenges that he, Kornilios Kourtis, and John Fastabend have run into in their work on Tetragon (Apache-licensed BPF-based security monitoring software) at the Linux Storage, Filesystem, Memory Management, and BPF Summit. The session prompted discussion about the feasibility of letting BPF programs send data over the network, as well as potential new kfuncs to let BPF firewalls send TCP reset packets. Tardy presented several possible ways that these could be accomplished.

daroc

[$] System-wide encrypted DNS

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The increasing sophistication of attackers has organizations realizing that perimeter-based security models are inadequate. Many are planning to transition their internal networks to a zero-trust architecture. This requires every communication on the network to be encrypted, authenticated, and authorized. This can be achieved in applications and services by using modern communication protocols. However, the world still depends on Domain Name System (DNS) services where encryption, while possible, is far from being the industry standard. To address this we, as part of a working group at Red Hat, worked on fully integrating encrypted DNS for Linux systems—not only while the system is running but also during the installation and boot process, including support for a custom certificate chain in the initial ramdisk. This integration is now available in CentOS Stream 9, 10, and the upcoming Fedora 43 release.

jzb

Security updates for Wednesday

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Security updates have been issued by AlmaLinux (gstreamer1-plugins-bad-free and kernel), Arch Linux (bind and varnish), Debian (glibc and syslog-ng), Fedora (microcode_ctl, mozilla-ublock-origin, nodejs20, and nodejs22), Mageia (firefox, nss, rootcerts, open-vm-tools, sqlite3, and thunderbird), Oracle (gstreamer1-plugins-bad-free, kernel, libsoup, nodejs:22, php, php:8.2, php:8.3, python-tornado, redis, and redis:7), Red Hat (libsoup, pcs, and python-tornado), Slackware (mozilla), SUSE (bind, dnsdist, elemental-operator, govulncheck-vulndb, gstreamer-plugins-bad, jetty-annotations, jq, libnss_slurm2, libyelp0, mariadb, nvidia-open-driver-G06-signed, prometheus-blackbox_exporter, python-h11, python-httpcore, python-setuptools, python312, python39-setuptools, screen, sqlite3, umoci, and webkit2gtk3), and Ubuntu (cifs-utils, glibc, linux-aws, linux-intel-iotg-5.15, linux-nvidia-tegra-igx, linux-raspi, linux-aws-fips, linux-hwe-6.8, linux-lowlatency, linux-lowlatency-hwe-6.11, linux-oracle, linux-raspi, linux-raspi-5.4, and net-tools).
jzb

Szavaztam

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Szavaztam trey 2025. 05. 28., sze – 14:17
trey

AlmaLinux OS 10.0 released

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Version 10 of the AlmaLinux OS distribution has been released.

The goal of AlmaLinux OS is to support our community, and AlmaLinux OS 10 is the best example of that yet. With an unwavering eye on maintaining compatibility with Red Hat Enterprise Linux (RHEL), we have made small improvements to AlmaLinux OS 10 that target specific sections of our userbase.

See the release notes for details.

corbet

[$] Verifying the BPF verifier's path-exploration logic

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Srinivas Narayana led a remote session about extending Agni to prove the correctness of the BPF verifier's handling of different execution paths as part of the Linux Storage, Filesystem, Memory Management, and BPF Summit. The problem of ensuring the correctness of path exploration is much more difficult than the problem of ensuring the correctness of arithmetic operations (which was the subject of the previous session), however. Narayana's plan to tackle the problem makes use of a mixture of specialized techniques — and may need some assistance from the BPF developers to make it feasible at all.

daroc

[$] Cory Doctorow on how we lost the internet

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Cory Doctorow wears many hats: digital activist, science-fiction author, journalist, and more. He has also written many books, both fiction and non-fiction, runs the Pluralistic blog, is a visiting professor, and is an advisor to the Electronic Frontier Foundation (EFF); his Chokepoint Capitalism co-author, Rebecca Giblin, gave a 2023 keynote in Australia that we covered. Doctorow gave a rousing keynote on the state of the "enshitternet"—today's internet—to kick off the recently held PyCon US 2025 in Pittsburgh, Pennsylvania.
jake

Security updates for Tuesday

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Security updates have been issued by AlmaLinux (gstreamer1-plugins-bad-free, libsoup, and python-tornado), Debian (libavif and pgbouncer), Red Hat (gstreamer1-plugins-bad-free, mingw-freetype and spice-client-win, and webkit2gtk3), SUSE (firefox, govulncheck-vulndb, and python310-setuptools), and Ubuntu (flask, intel-microcode, openjdk-17-crac, tika, and Tomcat).
corbet