CVE-2014-8173

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    CVE-2014-8173

    Published: 16 Mar 2015Last Modified: 10 Apr 2026

    Summary:

    Details: The pmd_none_or_trans_huge_or_clear_bad function in include/asm-generic/pgtable.h in the Linux kernel before 3.13 on NUMA systems does not properly determine whether a Page Middle Directory (PMD) entry is a transparent huge-table entry, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted MADV_WILLNEED madvise system call that leverages the absence of a page-table lock.

    References: http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html, http://rhn.redhat.com/errata/RHSA-2015-0290.html, http://rhn.redhat.com/errata/RHSA-2015-0694.html, https://github.com/torvalds/linux/commit/ee53664bda169f519ce3c6a22d378f0b946c8178, https://bugzilla.redhat.com/show_bug.cgi?id=1198457, http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ee53664bda169f519ce3c6a22d378f0b946c8178

    Affected packages

    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