CVE-2026-3888 Details
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.
A local privilege escalation vulnerability has been identified in snapd on various Ubuntu LTS versions. This issue allows local attackers to gain root privileges by recreating snap's private temporary directory. The vulnerability arises when systemd-tmpfiles is set to automatically clean up this directory, affecting Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 24.04 LTS.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 17, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/03/18/1 | CVE | Mailing ListThird Party Advisory |
| https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root | [email protected] | MitigationThird Party Advisory |
| https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt | [email protected] | Third Party Advisory |
| https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888 | [email protected] | MitigationThird Party Advisory |
| https://ubuntu.com/security/CVE-2026-3888 | [email protected] | Third Party Advisory |
| https://ubuntu.com/security/notices/USN-8102-1 | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-268 | Privilege Chaining | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| canonical ubuntu linux | 16.04 18.04 20.04 22.04 24.04 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 4, 2026 | Initial Analysis | [email protected] |
| Mar 18, 2026 | CVE Modified | CVE |
| Mar 18, 2026 | CVE Modified | [email protected] |
| Mar 17, 2026 | New CVE Received | [email protected] |