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    CVE-2017-12154

    The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register.

    Published:Sep 12, 2017
    Last Modified:Apr 20, 2025
    EPS:Sep 26, 2017
    EPSS Score:0.00031
    CVSS Score:7.1

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Extras Rt

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

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    References

    http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f
    http://www.debian.org/security/2017/dsa-3981
    http://www.securityfocus.com/bid/100856
    https://access.redhat.com/errata/RHSA-2018:0676
    https://access.redhat.com/errata/RHSA-2018:1062
    https://access.redhat.com/errata/RHSA-2019:1946
    https://bugzilla.redhat.com/show_bug.cgi?id=1491224
    https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f
    https://usn.ubuntu.com/3698-1/
    https://usn.ubuntu.com/3698-2/
    https://www.spinics.net/lists/kvm/msg155414.html
    http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f
    http://www.debian.org/security/2017/dsa-3981
    http://www.securityfocus.com/bid/100856
    https://access.redhat.com/errata/RHSA-2018:0676
    https://access.redhat.com/errata/RHSA-2018:1062
    https://access.redhat.com/errata/RHSA-2019:1946
    https://bugzilla.redhat.com/show_bug.cgi?id=1491224
    https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f
    https://usn.ubuntu.com/3698-1/
    https://usn.ubuntu.com/3698-2/
    https://www.spinics.net/lists/kvm/msg155414.html

    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