CVE-2026-3888 | BDVDB-2026-320863 Detail
CanonicalUbuntu 16.04 LTS
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.
Impact#
CAPEC-233 Privilege Escalation
Weaknesses#
- CWE-268 Privilege chaining
References#
- https://ubuntu.com/security/CVE-2026-3888
- https://ubuntu.com/security/notices/USN-8102-1
- https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888
- https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root
- https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
- http://www.openwall.com/lists/oss-security/2026/03/18/1
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.