CVE record · CVE-2026-3888

Local Privilege Escalation in snapd

CVSS 7.8 HighEPSS 0.014 · 72nd percentile

Published by the CVE Program (CNA: canonical) at 17 Mar 2026, 14:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	Not given Package name: snapd https://github.com/canonical	affected before 2.75.1 semver Other versions: unaffected
Canonical	Ubuntu 16.04 LTS Package name: snapd https://launchpad.net/ubuntu/xenial	unaffected 2.61.4ubuntu0.16.04.1+esm2 to before * dpkg Other versions: affected
Canonical	Ubuntu 18.04 LTS Package name: snapd https://launchpad.net/ubuntu/bionic	unaffected 2.61.4ubuntu0.18.04.1+esm2 to before * dpkg Other versions: affected
Canonical	Ubuntu 20.04 LTS Package name: snapd https://launchpad.net/ubuntu/focal	unaffected 2.67.1+20.04ubuntu1~esm1 to before * dpkg Other versions: affected
Canonical	Ubuntu 22.04 LTS Package name: snapd https://launchpad.net/ubuntu/jammy	unaffected 2.73+ubuntu22.04.1 to before * dpkg Other versions: affected
Canonical	Ubuntu 24.04 LTS Package name: snapd https://launchpad.net/ubuntu/noble	unaffected 2.73+ubuntu24.04.2 to before * dpkg Other versions: affected

Identifiers: CVE-2026-3888
CNA: canonical
Weakness (CWE): CWE-268
Tags: Canonical Ubuntu 16.04 LTS
Canonical Ubuntu 18.04 LTS
Canonical Ubuntu 20.04 LTS
Canonical Ubuntu 22.04 LTS
Canonical Ubuntu 24.04 LTS
Privilege escalation
Published: 17 Mar 2026
Updated: 18 Mar 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.1	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H	CNA (canonical)

CISA KEV Not listed.
EPSS 0.014, the 72nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 17 Mar 2026. New records show when each source confirmed them.

Sources

References from the CNA

ubuntu.com/security/CVE-2026-3888 vdb-entryissue-tracking
ubuntu.com/security/notices/USN-8102-1 vendor-advisory
discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888 technical-descriptionvendor-advisory
blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root technical-descriptionmedia-coverage
cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt technical-descriptionmedia-coverage

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.