PT-2026-25897 · Canonical · Ubuntu 16.04 Lts+4

Published 2026-03-17 · Updated 2026-03-17 · CVE-2026-3888

Mitre

CVSS v3.1

7.8

7.8

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

Fix

Weakness Enumeration

CWE-268

Related Identifiers

CVE-2026-3888

Affected Products

Ubuntu 16.04 Lts

Ubuntu 18.04 Lts

Ubuntu 20.04 Lts

Ubuntu 22.04 Lts

Ubuntu 24.04 Lts

References · 2

• https://ubuntu.com/security/CVE-2026-3888 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-3888 · Security Note