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    CVE-2014-5045

    The mountpoint_last function in fs/namei.c in the Linux kernel before 3.15.8 does not properly maintain a certain reference count during attempts to use the umount system call in conjunction with a symlink, which allows local users to cause a denial of service (memory consumption or use-after-free) or possibly have unspecified other impact via the umount program.

    Published:Jul 20, 2014
    Last Modified:Apr 12, 2025
    EPS:Aug 1, 2014
    EPSS Score:0.00029
    CVSS Score:6.2

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c16212https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c16212

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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=295dc39d941dc2ae53d5c170365af4c9d5c16212
    http://rhn.redhat.com/errata/RHSA-2015-0062.html
    http://secunia.com/advisories/60353
    http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8
    http://www.openwall.com/lists/oss-security/2014/07/24/2
    http://www.securityfocus.com/bid/68862
    https://bugzilla.redhat.com/show_bug.cgi?id=1122472
    https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c16212
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=295dc39d941dc2ae53d5c170365af4c9d5c16212
    http://rhn.redhat.com/errata/RHSA-2015-0062.html
    http://secunia.com/advisories/60353
    http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8
    http://www.openwall.com/lists/oss-security/2014/07/24/2
    http://www.securityfocus.com/bid/68862
    https://bugzilla.redhat.com/show_bug.cgi?id=1122472
    https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c16212

    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