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    CVE-2014-9717

    fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.

    Published:Oct 7, 2014
    Last Modified:Apr 12, 2025
    EPS:May 2, 2016
    EPSS Score:0.00041
    CVSS Score:6.1

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

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    References

    http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce07d891a0891d3c0d0c2d73d577490486b809e1
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
    http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2
    http://www.openwall.com/lists/oss-security/2015/04/17/4
    http://www.securityfocus.com/bid/74226
    http://www.spinics.net/lists/linux-containers/msg30786.html
    https://bugzilla.redhat.com/show_bug.cgi?id=1226751
    https://github.com/torvalds/linux/commit/ce07d891a0891d3c0d0c2d73d577490486b809e1
    https://groups.google.com/forum/message/raw?msg=linux.kernel/HnegnbXk0Vs/RClojwJzAFEJ
    http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce07d891a0891d3c0d0c2d73d577490486b809e1
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
    http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2
    http://www.openwall.com/lists/oss-security/2015/04/17/4
    http://www.securityfocus.com/bid/74226
    http://www.spinics.net/lists/linux-containers/msg30786.html
    https://bugzilla.redhat.com/show_bug.cgi?id=1226751
    https://github.com/torvalds/linux/commit/ce07d891a0891d3c0d0c2d73d577490486b809e1
    https://groups.google.com/forum/message/raw?msg=linux.kernel/HnegnbXk0Vs/RClojwJzAFEJ

    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