Local Privilege Escalation in snapd
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.4%
exploitation probability
0.4%top 69% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
snapdCanonical · Ubuntu 16.04 LTSCanonical · Ubuntu 18.04 LTSCanonical · Ubuntu 20.04 LTSCanonical · Ubuntu 22.04 LTSCanonical · Ubuntu 24.04 LTSReferences
https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-roothttps://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txthttps://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888https://ubuntu.com/security/CVE-2026-3888https://ubuntu.com/security/notices/USN-8102-1http://www.openwall.com/lists/oss-security/2026/03/18/1