CVEvulnerability
CVE-2026-3888
7.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-03-17
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-268
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.
Affected configurations
• canonical ubuntu linux 16.04
• canonical ubuntu linux 18.04
• canonical ubuntu linux 20.04
• canonical ubuntu linux 22.04
• canonical ubuntu linux 24.04
Related
Weakness · CWE (1)
- CWE-268 Privilege Chaining weakness
References
- https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root Mitigation, Third Party Advisory
- https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt Third Party Advisory
- https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888 Mitigation, Third Party Advisory
- https://ubuntu.com/security/CVE-2026-3888 Third Party Advisory
- https://ubuntu.com/security/notices/USN-8102-1 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/03/18/1 Mailing List, Third Party Advisory