High severity7.8NVD Advisory· Published Mar 17, 2026· Updated Jun 4, 2026
CVE-2026-3888
CVE-2026-3888
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 Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*+ 4 more
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:24.04:*:*:*:lts:*:*:*
Patches
Vulnerability mechanics
References
6- www.openwall.com/lists/oss-security/2026/03/18/1nvdMailing ListThird Party Advisory
- blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-rootnvdMitigationThird Party Advisory
- cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txtnvdThird Party Advisory
- discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888nvdMitigationThird Party Advisory
- ubuntu.com/security/CVE-2026-3888nvdThird Party Advisory
- ubuntu.com/security/notices/USN-8102-1nvdThird Party Advisory
News mentions
1- New Ubuntu Flaw Enables Local Attackers to Gain Root AccessInfosecurity Magazine · Mar 18, 2026