Yet another critical vulnerability in systemd, this time involving snapd. Ubuntu folk are affected.
“A serious security issue has been discovered in Ubuntu, and it is gaining attention in the cybersecurity community. The vulnerability is identified as CVE-2026-3888 and mainly affects Ubuntu Desktop systems from version 24.04 onwards. This flaw is dangerous because it allows an attacker with limited access to gain full root privileges. Root access means complete control over the entire system.”
This is a critical vulnerability in snapd, not systemd. It sounds like it could also be exploited if something other than systemd deleted the files in
/tmp/. Or if/tmp/was not mounted.Is it possible they mean both snapd the program and sysd the project have a vulnerability? Is snapd built by sysd, or more of like a ubuntu extension of the sysd ecosystem that they’ve built themselves?
Yet another critical vulnerability in the much vaunted systemd has been exposed by a misbehaving app - in this case snapd.
Both need patching.
Nothing in the Qualys report nor the Ubuntu page for the CVE indicate that there is something to be fixed in systemd, only that you can create systemd-tmpfiles rules that will expose the vulnerability in snapd.
What do you think systemd-tmpfiles needs to do differently?