CVE-2026-3888 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://ubuntu.com/security/CVE-2026-3888

History

Tue, 17 Mar 2026 15:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 17 Mar 2026 14:15:00 +0000

Type	Values Removed	Values Added
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.
Title		Local Privilege Escalation in snapd
Weaknesses		CWE-268
References		https://ubuntu.com/security/CVE-2026-3888
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'}`

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: canonical

Published: 2026-03-17T14:02:08.475Z

Updated: 2026-03-17T14:50:45.697Z

Reserved: 2026-03-10T16:03:08.583Z

Link: CVE-2026-3888

Vulnrichment

Updated: 2026-03-17T14:50:42.589Z

NVD

Status : Awaiting Analysis

Published: 2026-03-17T14:16:17.410

Modified: 2026-03-17T14:20:01.670

Link: CVE-2026-3888

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-268

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-3888", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "state": "PUBLISHED", "assignerShortName": "canonical", "dateReserved": "2026-03-10T16:03:08.583Z", "datePublished": "2026-03-17T14:02:08.475Z", "dateUpdated": "2026-03-17T14:50:45.697Z"}, "containers": {"cna": {"title": "Local Privilege Escalation in snapd", "datePublic": "2026-03-17T14:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-268", "description": "CWE-268 Privilege chaining", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-233", "descriptions": [{"lang": "en", "value": "CAPEC-233 Privilege Escalation"}]}], "affected": [{"collectionURL": "https://github.com/canonical", "packageName": "snapd", "repo": "https://github.com/canonical/snapd/", "versions": [{"status": "affected", "version": "0", "lessThan": "2.75.1", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Canonical", "product": "Ubuntu 16.04 LTS", "platforms": ["Linux"], "collectionURL": "https://launchpad.net/ubuntu/xenial", "packageName": "snapd", "repo": "https://launchpad.net/ubuntu/+source/snapd", "versions": [{"status": "unaffected", "version": "2.61.4ubuntu0.16.04.1+esm2", "lessThan": "*", "versionType": "dpkg"}], "defaultStatus": "affected"}, {"vendor": "Canonical", "product": "Ubuntu 18.04 LTS", "platforms": ["Linux"], "collectionURL": "https://launchpad.net/ubuntu/bionic", "packageName": "snapd", "repo": "https://launchpad.net/ubuntu/+source/snapd", "versions": [{"status": "unaffected", "version": "2.61.4ubuntu0.18.04.1+esm2", "lessThan": "*", "versionType": "dpkg"}], "defaultStatus": "affected"}, {"vendor": "Canonical", "product": "Ubuntu 20.04 LTS", "platforms": ["Linux"], "collectionURL": "https://launchpad.net/ubuntu/focal", "packageName": "snapd", "repo": "https://launchpad.net/ubuntu/+source/snapd", "versions": [{"status": "unaffected", "version": "2.67.1+20.04ubuntu1~esm1", "lessThan": "*", "versionType": "dpkg"}], "defaultStatus": "affected"}, {"vendor": "Canonical", "product": "Ubuntu 22.04 LTS", "platforms": ["Linux"], "collectionURL": "https://launchpad.net/ubuntu/jammy", "packageName": "snapd", "repo": "https://launchpad.net/ubuntu/+source/snapd", "versions": [{"status": "unaffected", "version": "2.73+ubuntu22.04.1", "lessThan": "*", "versionType": "dpkg"}], "defaultStatus": "affected"}, {"vendor": "Canonical", "product": "Ubuntu 24.04 LTS", "platforms": ["Linux"], "collectionURL": "https://launchpad.net/ubuntu/noble", "packageName": "snapd", "repo": "https://launchpad.net/ubuntu/+source/snapd", "versions": [{"status": "unaffected", "version": "2.73+ubuntu24.04.1", "lessThan": "*", "versionType": "dpkg"}], "defaultStatus": "affected"}], "descriptions": [{"lang": "en", "value": "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."}], "references": [{"url": "https://ubuntu.com/security/CVE-2026-3888", "tags": ["vdb-entry", "issue-tracking"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"}}], "credits": [{"lang": "en", "value": "Qualys Security Advisory Team", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-03-17T14:02:08.475Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-17T14:50:38.432846Z", "id": "CVE-2026-3888", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-17T14:50:45.697Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-3888", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-03-17T14:50:38.432846Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-17T14:50:42.589Z"}}], "cna": {"title": "Local Privilege Escalation in snapd", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Qualys Security Advisory Team"}], "impacts": [{"capecId": "CAPEC-233", "descriptions": [{"lang": "en", "value": "CAPEC-233 Privilege Escalation"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/canonical/snapd/", "versions": [{"status": "affected", "version": "0", "lessThan": "2.75.1", "versionType": "semver"}], "packageName": "snapd", "collectionURL": "https://github.com/canonical", "defaultStatus": "unaffected"}, {"repo": "https://launchpad.net/ubuntu/+source/snapd", "vendor": "Canonical", "product": "Ubuntu 16.04 LTS", "versions": [{"status": "unaffected", "version": "2.61.4ubuntu0.16.04.1+esm2", "lessThan": "*", "versionType": "dpkg"}], "platforms": ["Linux"], "packageName": "snapd", "collectionURL": "https://launchpad.net/ubuntu/xenial", "defaultStatus": "affected"}, {"repo": "https://launchpad.net/ubuntu/+source/snapd", "vendor": "Canonical", "product": "Ubuntu 18.04 LTS", "versions": [{"status": "unaffected", "version": "2.61.4ubuntu0.18.04.1+esm2", "lessThan": "*", "versionType": "dpkg"}], "platforms": ["Linux"], "packageName": "snapd", "collectionURL": "https://launchpad.net/ubuntu/bionic", "defaultStatus": "affected"}, {"repo": "https://launchpad.net/ubuntu/+source/snapd", "vendor": "Canonical", "product": "Ubuntu 20.04 LTS", "versions": [{"status": "unaffected", "version": "2.67.1+20.04ubuntu1~esm1", "lessThan": "*", "versionType": "dpkg"}], "platforms": ["Linux"], "packageName": "snapd", "collectionURL": "https://launchpad.net/ubuntu/focal", "defaultStatus": "affected"}, {"repo": "https://launchpad.net/ubuntu/+source/snapd", "vendor": "Canonical", "product": "Ubuntu 22.04 LTS", "versions": [{"status": "unaffected", "version": "2.73+ubuntu22.04.1", "lessThan": "*", "versionType": "dpkg"}], "platforms": ["Linux"], "packageName": "snapd", "collectionURL": "https://launchpad.net/ubuntu/jammy", "defaultStatus": "affected"}, {"repo": "https://launchpad.net/ubuntu/+source/snapd", "vendor": "Canonical", "product": "Ubuntu 24.04 LTS", "versions": [{"status": "unaffected", "version": "2.73+ubuntu24.04.1", "lessThan": "*", "versionType": "dpkg"}], "platforms": ["Linux"], "packageName": "snapd", "collectionURL": "https://launchpad.net/ubuntu/noble", "defaultStatus": "affected"}], "datePublic": "2026-03-17T14:00:00.000Z", "references": [{"url": "https://ubuntu.com/security/CVE-2026-3888", "tags": ["vdb-entry", "issue-tracking"]}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-268", "description": "CWE-268 Privilege chaining"}]}], "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-03-17T14:02:08.475Z"}}}, "cveMetadata": {"cveId": "CVE-2026-3888", "state": "PUBLISHED", "dateUpdated": "2026-03-17T14:50:45.697Z", "dateReserved": "2026-03-10T16:03:08.583Z", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "datePublished": "2026-03-17T14:02:08.475Z", "assignerShortName": "canonical"}, "dataVersion": "5.2"}