CVE-2026-3888

high

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.

References

https://ubuntu.com/security/notices/USN-8102-1

https://ubuntu.com/security/CVE-2026-3888

https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888

http://www.openwall.com/lists/oss-security/2026/03/18/1

https://securityaffairs.com/189716/security/apple-urges-iphone-users-to-update-as-coruna-and-darksword-exploit-kits-emerge.html

https://thehackernews.com/2026/07/ubuntu-snap-confine-flaw-could-give.html

https://www.infosecurity-magazine.com/news/ubuntu-flaw-enables-root-access/

https://thehackernews.com/2026/03/ubuntu-cve-2026-3888-bug-lets-attackers.html

https://securityaffairs.com/189614/security/cve-2026-3888-ubuntu-desktop-24-04-vulnerable-to-root-exploit.html

Details

Source: Mitre, NVD

Published: 2026-03-17

Updated: 2026-06-04

Risk Information

CVSS v2

Base Score: 6

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00006