CVE-2026-3888

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 31.3% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-17 14:02Z5 MO AGO

Last updated

2026-03-18 08:59Z5 MO AGO

Reserved

2026-03-10

Assigning CNA

canonical

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-268Privilege ChainingBase

Data version

5.2

Document digest

4b01beccb85a1035f8e6b1f5e69c1995c61ec7760a300469eba4e8ea412b16c9

• ubuntu.comhttps://ubuntu.com/security/CVE-2026-3888vdb-entryissue-tracking
• ubuntu.comhttps://ubuntu.com/security/notices/USN-8102-1vendor-advisory
• discourse.ubuntu.comhttps://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888technical-descriptionvendor-advisory
• blog.qualys.comhttps://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-roottechnical-descriptionmedia-coverage
• cdn2.qualys.comhttps://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txttechnical-descriptionmedia-coverage
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/03/18/1