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
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
security@ubuntu.comhttps://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root
security@ubuntu.comhttps://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt
security@ubuntu.comhttps://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888
security@ubuntu.comhttps://ubuntu.com/security/CVE-2026-3888
security@ubuntu.comhttps://ubuntu.com/security/notices/USN-8102-1
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/03/18/1
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "La escalada de privilegios local en snapd en Linux permite a los atacantes locales obtener privilegios de root al recrear el directorio /tmp privado de snap cuando systemd-tmpfiles est\u00e1 configurado para limpiar autom\u00e1ticamente este directorio. Este problema afecta a Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS y 24.04 LTS."
    }
  ],
  "id": "CVE-2026-3888",
  "lastModified": "2026-03-18T04:17:30.720",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.1,
        "impactScore": 6.0,
        "source": "security@ubuntu.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-17T14:16:17.410",
  "references": [
    {
      "source": "security@ubuntu.com",
      "url": "https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://ubuntu.com/security/CVE-2026-3888"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://ubuntu.com/security/notices/USN-8102-1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/03/18/1"
    }
  ],
  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-268"
        }
      ],
      "source": "security@ubuntu.com",
      "type": "Secondary"
    }
  ]
}


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