| Name | CVE-2026-3888 |
| Description | Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap's private /tmp directory when systemd-tmpfiles is configured to automatically clean up this directory. This issue affects Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 24.04 LTS. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6170-1 |
| Debian Bugs | 1131120 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| snapd (PTS) | bullseye (security), bullseye | 2.49-1+deb11u2 | vulnerable |
| bookworm | 2.57.6-1 | vulnerable | |
| bookworm (security) | 2.57.6-1+deb12u1 | fixed | |
| trixie | 2.68.3-3 | vulnerable | |
| trixie (security) | 2.68.3-3+deb13u1 | fixed | |
| forky, sid | 2.74.1-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| snapd | source | bookworm | 2.57.6-1+deb12u1 | DSA-6170-1 | ||
| snapd | source | trixie | 2.68.3-3+deb13u1 | DSA-6170-1 | ||
| snapd | source | (unstable) | (unfixed) | 1131120 |
https://www.openwall.com/lists/oss-security/2026/03/17/8
https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
Fixed by: https://github.com/canonical/snapd/commit/5400bfdf1e4c3f861826a215417234420470cb25