Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888
- https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
- https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888
- https://ubuntu.com/security/CVE-2026-3888
- https://ubuntu.com/security/notices/USN-8102-1
- http://www.openwall.com/lists/oss-security/2026/03/18/1
FAQ
What is CVE-2026-3888?
CVE-2026-3888 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 thi...
How severe is CVE-2026-3888?
CVE-2026-3888 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3888?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.