Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Not supplied / Not supplied | affected 0 before 2.75.1 |
| Canonical / Ubuntu 16.04 LTS | unaffected 2.61.4ubuntu0.16.04.1+esm2 before * |
| Canonical / Ubuntu 18.04 LTS | unaffected 2.61.4ubuntu0.18.04.1+esm2 before * |
| Canonical / Ubuntu 20.04 LTS | unaffected 2.67.1+20.04ubuntu1~esm1 before * |
| Canonical / Ubuntu 22.04 LTS | unaffected 2.73+ubuntu22.04.1 before * |
| Canonical / Ubuntu 24.04 LTS | unaffected 2.73+ubuntu24.04.2 before * |
CWE
CWE-268
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
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.