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CVE-2026-3888
HIGH7.8
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.
CVE Details
CVSS v3.1 Score7.8
SeverityHIGH
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack VectorLOCAL
ComplexityHIGH
Privileges RequiredLOW
User InteractionNONE
Published3/17/2026
Last Modified3/18/2026
Sourcenvd
Honeypot Sightings0
Weaknesses (CWE)
CWE-268
References
https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root(security@ubuntu.com)
https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt(security@ubuntu.com)
https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888(security@ubuntu.com)
https://ubuntu.com/security/CVE-2026-3888(security@ubuntu.com)
https://ubuntu.com/security/notices/USN-8102-1(security@ubuntu.com)
http://www.openwall.com/lists/oss-security/2026/03/18/1(af854a3a-2127-422b-91ae-364da2661108)
IOC Correlations
No correlations recorded
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