UBUNTU-CVE-2014-8989

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    UBUNTU-CVE-2014-8989

    Published: 29 Nov 2014Last Modified: 26 Aug 2026
    Upstream:
    CVE-2014-8989
    Aliases:
    USN-2515-1
    USN-2516-1
    USN-2517-1

    Summary:

    Details: The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a "negative groups" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.

    References: https://ubuntu.com/security/CVE-2014-8989, http://thread.gmane.org/gmane.linux.man/7385/, https://ubuntu.com/security/notices/USN-2515-1, https://ubuntu.com/security/notices/USN-2516-1, https://ubuntu.com/security/notices/USN-2517-1, https://ubuntu.com/security/notices/USN-2518-1, http://www.openwall.com/lists/oss-security/2014/11/20/4, https://www.cve.org/CVERecord?id=CVE-2014-8989

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/ubuntu/linux?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-46.75

    Affected versions

    3.11.0-12.19

    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
    UBUNTU-CVE-2014-8989 | CVE-DB