https://seclists.org/oss-sec/2026/q1/330: snap-confine + systemd-tmpfiles = root (CVE-2026-3888)
Published Mar 17, 2026
·Updated
Affected Software
2 affected components
Ubuntu Ubuntu Desktop>=24.04
Ubuntu Ubuntu Desktop
Frequently Asked Questions
1
What is the severity of CVE-2026-3888?
CVE-2026-3888 is considered a critical vulnerability due to its potential to allow unprivileged users to gain root access.
2
How do I fix CVE-2026-3888?
To fix CVE-2026-3888, update your Ubuntu system to apply the latest security patches provided by the distribution.
3
What systems are affected by CVE-2026-3888?
CVE-2026-3888 primarily affects Ubuntu Desktop systems that utilize snap-confine with world-writable /tmp directories.
4
What impacts does CVE-2026-3888 have on my system?
If exploited, CVE-2026-3888 could allow attackers to execute arbitrary commands with root privileges, leading to complete system compromise.
5
Is there a workaround for CVE-2026-3888?
A temporary workaround for CVE-2026-3888 is to change the permissions of the /tmp directory to prevent world-writable access.