Vulnerability-Lookup

CVE-2026-3888 (GCVE-0-2026-3888)

Vulnerability from cvelistv5 – Published: 2026-03-17 14:02 – Updated: 2026-03-18 08:59

Title

Local Privilege Escalation in snapd

Summary

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.

Severity ?

7.8 (High)


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

CWE

CWE-268 - Privilege chaining

Assigner

canonical

References

URL

Tags

	https://ubuntu.com/security/CVE-2026-3888	vdb-entryissue-tracking
	https://ubuntu.com/security/notices/USN-8102-1	vendor-advisory
	https://discourse.ubuntu.com/t/snapd-local-privil…	technical-descriptionvendor-advisory
	https://blog.qualys.com/vulnerabilities-threat-re…	technical-descriptionmedia-coverage
	https://cdn2.qualys.com/advisory/2026/03/17/snap-…	technical-descriptionmedia-coverage

Impacted products

Vendor

Product

Version

Affected: 0 , < 2.75.1 (semver)

Canonical	Ubuntu 16.04 LTS	Unaffected: 2.61.4ubuntu0.16.04.1+esm2 , < * (dpkg)
Canonical	Ubuntu 18.04 LTS	Unaffected: 2.61.4ubuntu0.18.04.1+esm2 , < * (dpkg)
Canonical	Ubuntu 20.04 LTS	Unaffected: 2.67.1+20.04ubuntu1~esm1 , < * (dpkg)
Canonical	Ubuntu 22.04 LTS	Unaffected: 2.73+ubuntu22.04.1 , < * (dpkg)
Canonical	Ubuntu 24.04 LTS	Unaffected: 2.73+ubuntu24.04.2 , < * (dpkg)

Date Public ?

2026-03-17 14:00

Credits

Qualys Security Advisory Team

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-3888

Vulnerability from fkie_nvd - Published: 2026-03-17 14:16 - Updated: 2026-03-18 04:17

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	security@ubuntu.com	https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root
	security@ubuntu.com	https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
	security@ubuntu.com	https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888
	security@ubuntu.com	https://ubuntu.com/security/CVE-2026-3888
	security@ubuntu.com	https://ubuntu.com/security/notices/USN-8102-1
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/03/18/1

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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}

GHSA-GRPW-JGRW-CCQR

Vulnerability from github – Published: 2026-03-17 15:36 – Updated: 2026-03-18 06:31

Details

Severity ?

7.8 (High)


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

Show details on source website

JSON

To clipboard

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    "github_reviewed_at": null,
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    "severity": "HIGH"
  },
  "details": "Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap\u0027s 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.",
  "id": "GHSA-grpw-jgrw-ccqr",
  "modified": "2026-03-18T06:31:19Z",
  "published": "2026-03-17T15:36:23Z",
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    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3888"
    },
    {
      "type": "WEB",
      "url": "https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root"
    },
    {
      "type": "WEB",
      "url": "https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt"
    },
    {
      "type": "WEB",
      "url": "https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888"
    },
    {
      "type": "WEB",
      "url": "https://ubuntu.com/security/CVE-2026-3888"
    },
    {
      "type": "WEB",
      "url": "https://ubuntu.com/security/notices/USN-8102-1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/03/18/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-3888 (GCVE-0-2026-3888)

FKIE_CVE-2026-3888

GHSA-GRPW-JGRW-CCQR

Tags

Sightings

Nomenclature