CVE-2026-3888

7.8 HIGH
Published: March 17, 2026 Modified: June 04, 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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

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
Mitigation Third Party Advisory
https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
Source: security@ubuntu.com
Third Party Advisory
https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888
Source: security@ubuntu.com
Mitigation Third Party Advisory
https://ubuntu.com/security/CVE-2026-3888
Source: security@ubuntu.com
Third Party Advisory
https://ubuntu.com/security/notices/USN-8102-1
Source: security@ubuntu.com
Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/03/18/1
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.8 / 10.0
EPSS (Exploit Probability)
0.4%
30th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-268

Affected Vendors

canonical

Related CVEs

CVE-2026-48777 N/A
CVE-2026-47750 7.8
CVE-2026-47747 7.8
CVE-2026-46448 5.4
CVE-2026-22313 9.1