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Asahi Linux 7.3 progress report
Some time ago, we were made aware of multiple attempts to exploit our permissive licensing to hijack our work, with a direct view to replacing the project and aggressively monetising Linux on Apple Silicon. In some extreme cases, in-development feature code was being lifted straight out of our personal forks and published without attribution or lazily rewritten with LLM assistance to obfuscate its origin. The MIT licence explicitly allows this, and has no carveouts to protect against bad faith actors.
As such, we made the difficult decision to begin the process of transitioning all of our repositories to the GNU General Public License version 2 or later. Going forward all Asahi Linux code will be licenced under strong copyleft licences only. Those who do not learn from history are doomed to repeat it.
Amutable Foundations: A Technical Overview
The image-based OS approach enables us to enforce some very strict but powerful security properties, which elevate the security posture of the system substantially above traditional Linux systems. Specifically, let's highlight seven major essential security properties of AOS here:
- No Shell + No SSH + No Language Interpreters. By default AOS does not install a UNIX shell, nor makes remote access via SSH available on the nodes. Moreover, we do not install any of the usual language interpreters (Python, Perl, …) by default. For most nodes a shell or interpreted language support is not required and it removes a whole class of attacks.
- Signed Images Only. On AOS only images that come with Verity data signed by a signing key listed in the Verity keyring may be activated.
- [...]
Videos from XDC 2026 are available
[$] Locking down hibernation for the winter
When a computer hibernates, the kernel writes the contents of memory to disk and then shuts the system down. Resuming from hibernation involves reading that data back into memory, and then having the kernel pick up where it left off. Unfortunately, the kernel does not have any way to know that the data it is reading back has not been tampered with, which is why lockdown, an optional kernel feature that attempts to prevent modifications to the running kernel, disables hibernation. Matthew Garrett, who has been working on lockdown for many years, has shared a patch set that aims to fix this problem. His solution must also protect against downgrade attacks (where an attacker reboots the computer with an older kernel version to bypass new protections), which complicates the implementation.
Seven stable kernels with fixes for three Xen vulnerabilities
Hot on the heels of the previous two stable kernels, Greg Kroah-Hartman has announced the release of the 7.3.3, 6.18.62, 6.12.116, 6.6.162, 6.1.192, 5.15.225, and 5.10.274 stable kernels. Each one only contains fixes for three use-after-free vulnerabilities announced today by the Xen security team.
Two of the vulnerabilities could allow an attacker to cause a denial of service (DoS) for the entire Xen host machine with possible information leakage (CVE-2026-100080, CVE-2026-100082), and one may allow privilege escalation as well as a DoS of the host machine (CVE-2026-100081). Users should, of course, upgrade if they are using Xen.
7.3.3: stable
6.18.62: longterm
6.12.116: longterm
6.6.162: longterm
6.1.192: longterm
5.15.225: longterm
5.10.274: longterm
Security updates for Friday
[$] User namespaces + file capabilities = trouble
next-20261105: linux-next
Security updates for Thursday
Critical security vulnerability affects OpenSSH on Alpine Linux systems
Version 10.6p2 of OpenSSH has been released with a workaround for a critical vulnerability that affects Linux systems that use musl libc with PAM disabled, such as Alpine Linux. OpenSSH developer Damien Miller said:
If you operate a Linux system that uses musl libc without PAM (Alpine Linux is one example) then stop reading and set PasswordAuthentication=no or disable SSH for these systems IMMEDIATELY.
This vulnerability does not exist on non-Linux systems, Linux/glibc systems and Linux systems that use PAM for password authentication.
We consider the root cause of this bug to be outside OpenSSH itself, but we're in a good position to deliver a mitigation quickly.
The Alpine Linux project has announced that it will be backporting the OpenSSH fix "all the way back to Alpine 3.16", which was released in May 2022.
Artix 20261102
[$] LWN.net Weekly Edition for November 5, 2026
- Front: Kernel cells; Debian LLM reviews; glibc system-call wrappers; Binder in Rust; Kernel CVE flood; Fedora KDE and X11 removal; 7.4 merge window part two; Portable Python.
- Briefs: MTCP RCE; Bash security; XCPE botnet; Bazzite 45; Fedora 45; openSUSE Leap 16.1; Tor Browser 16.0; Quotes; ...
- Announcements: Newsletters, conferences, security updates, patches, and more.