CVE-2026-3888Local 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 th…
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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
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-268
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
canonical ubuntu_linux canonical:ubuntu_linux | 16.04; 18.04; 20.04; 22.04; 24.04 | NVD |
References
- https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-rootmitigation, third-party-advisory
- https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txtthird-party-advisory
- https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888mitigation, third-party-advisory
- https://ubuntu.com/security/CVE-2026-3888third-party-advisory
- https://ubuntu.com/security/notices/USN-8102-1third-party-advisory
- http://www.openwall.com/lists/oss-security/2026/03/18/1mailing-list, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.