CVE-2015-0239

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    CVE-2015-0239

    Published: 2 Mar 2015Last Modified: 16 Apr 2026

    Summary:

    Details: The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER instruction.

    References: http://rhn.redhat.com/errata/RHSA-2015-1272.html, http://www.debian.org/security/2015/dsa-3170, http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.5, http://www.mandriva.com/security/advisories?name=MDVSA-2015:058, http://www.openwall.com/lists/oss-security/2015/01/27/6, http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html, http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html, http://www.securityfocus.com/bid/72842, http://www.ubuntu.com/usn/USN-2513-1, http://www.ubuntu.com/usn/USN-2514-1, http://www.ubuntu.com/usn/USN-2515-1, http://www.ubuntu.com/usn/USN-2516-1, http://www.ubuntu.com/usn/USN-2517-1, http://www.ubuntu.com/usn/USN-2518-1, https://bugzilla.redhat.com/show_bug.cgi?id=1186448, https://github.com/torvalds/linux/commit/f3747379accba8e95d70cec0eae0582c8c182050, http://www.openwall.com/lists/oss-security/2015/01/27/6, http://www.openwall.com/lists/oss-security/2015/01/27/6, https://github.com/torvalds/linux/commit/f3747379accba8e95d70cec0eae0582c8c182050, https://bugzilla.redhat.com/show_bug.cgi?id=1186448, http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f3747379accba8e95d70cec0eae0582c8c182050, http://permalink.gmane.org/gmane.linux.kernel.commits.head/502245

    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
    CVE-2015-0239 | CVE-DB