CVE-2026-3888
HIGHCVSS v3.1: 7.8 · EPSS: 0.0001 (0.7 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 7.8 v3.1 · NVD
- EPSS
- 0.0001 (0.7 percentile) · FIRST.org
- CISA KEV
- No
- Attack conditions (CVSS vector)
- No user interaction · Source: NVD Vector
- Affected vendors
- canonical
- Published
- 2026-03-17 · Modified: 2026-06-04
- References
- Jump to references (6)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Reference https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important…
- Vendor advisory https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
- Distro https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888
- Distro https://ubuntu.com/security/CVE-2026-3888
- Distro https://ubuntu.com/security/notices/USN-8102-1
- Reference http://www.openwall.com/lists/oss-security/2026/03/18/1