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    CVE-2026-3888

    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.

    Published:Mar 17, 2026
    Last Modified:Jun 4, 2026
    EPS:Mar 17, 2026
    EPSS Score:0.00008
    CVSS Score:7.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu
    Vendor
    Canonical
    Product
    Ubuntu Linux

    Exploits

    https://github.com/DanielTangnes/CVE-2026-3888https://github.com/fevar54/CVE-2026-3888-POC-all-from-the-Qualys-platform.https://github.com/hewhomusntbenamed/CVE-2026-3888-fixedhttps://github.com/Many-Hat-Group/Ubuntu-CVE-2026-3888-patcherhttps://github.com/netw0rk7/CVE-2026-3888-PoChttps://github.com/noambouillet/CVE-2026-3888https://github.com/TheCyberGeek/CVE-2026-3888-snap-confine-systemd-tmpfiles-LPE

    Common Weakness Enumeration

    CWE-268 Privilege Chaining

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High