UBUNTU-CVE-2014-4171

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    UBUNTU-CVE-2014-4171

    Published: 23 Jun 2014Last Modified: 26 Aug 2026
    Upstream:
    CVE-2014-4171
    Aliases:
    USN-2334-1
    USN-2335-1
    USN-2336-1

    Summary:

    Details: mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement the interaction between range notification and hole punching, which allows local users to cause a denial of service (i_mutex hold) by using the mmap system call to access a hole, as demonstrated by interfering with intended shmem activity by blocking completion of (1) an MADV_REMOVE madvise call or (2) an FALLOC_FL_PUNCH_HOLE fallocate call.

    References: https://ubuntu.com/security/CVE-2014-4171, http://ozlabs.org/~akpm/mmots/broken-out/shmem-fix-faulting-into-a-hole-while-its-punched.patch, https://lkml.org/lkml/2014/7/2/518, https://ubuntu.com/security/notices/USN-2334-1, https://ubuntu.com/security/notices/USN-2335-1, https://ubuntu.com/security/notices/USN-2336-1, https://ubuntu.com/security/notices/USN-2337-1, https://www.cve.org/CVERecord?id=CVE-2014-4171

    Affected packages

    Package

    Name: linux

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-35.62

    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