CVE-2026-3888

7.8 HIGH
Published: March 17, 2026 Modified: March 18, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root
Source: security@ubuntu.com
https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
Source: security@ubuntu.com
https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888
Source: security@ubuntu.com
https://ubuntu.com/security/CVE-2026-3888
Source: security@ubuntu.com
https://ubuntu.com/security/notices/USN-8102-1
Source: security@ubuntu.com
http://www.openwall.com/lists/oss-security/2026/03/18/1
Source: af854a3a-2127-422b-91ae-364da2661108

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.8 / 10.0
EPSS (Exploit Probability)
0.0%
0th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-268

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