CVE-2017-7518

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    CVE-2017-7518

    Published: 30 Jul 2018Last Modified: 16 Apr 2026

    Summary:

    Details: A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.

    References: https://usn.ubuntu.com/3619-1/, https://usn.ubuntu.com/3619-2/, http://www.securityfocus.com/bid/99263, http://www.securitytracker.com/id/1038782, https://access.redhat.com/errata/RHSA-2018:0395, https://usn.ubuntu.com/3754-1/, https://www.debian.org/security/2017/dsa-3981, https://access.redhat.com/errata/RHSA-2018:0412, https://access.redhat.com/articles/3290921, https://www.spinics.net/lists/kvm/msg151817.html, http://www.openwall.com/lists/oss-security/2017/06/23/5, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2017-7518 | CVE-DB