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    CVE-2014-8481

    The instruction decoder in arch/x86/kvm/emulate.c in the KVM subsystem in the Linux kernel before 3.18-rc2 does not properly handle invalid instructions, which allows guest OS users to cause a denial of service (NULL pointer dereference and host OS crash) via a crafted application that triggers (1) an improperly fetched instruction or (2) an instruction that occupies too many bytes. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-8480.

    Published:Oct 13, 2014
    Last Modified:Apr 12, 2025
    EPS:Nov 10, 2014
    EPSS Score:0.00072
    CVSS Score:4.9

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    http://www.openwall.com/lists/oss-security/2014/10/23/7https://github.com/torvalds/linux/commit/a430c9166312e1aa3d80bce32374233bdbfeba32http://www.openwall.com/lists/oss-security/2014/10/23/7https://github.com/torvalds/linux/commit/a430c9166312e1aa3d80bce32374233bdbfeba32

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a430c9166312e1aa3d80bce32374233bdbfeba32
    http://secunia.com/advisories/62042
    http://thread.gmane.org/gmane.comp.emulators.kvm.devel/128427
    http://www.openwall.com/lists/oss-security/2014/10/23/7
    https://bugzilla.redhat.com/show_bug.cgi?id=1156615
    https://github.com/torvalds/linux/commit/a430c9166312e1aa3d80bce32374233bdbfeba32
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a430c9166312e1aa3d80bce32374233bdbfeba32
    http://secunia.com/advisories/62042
    http://thread.gmane.org/gmane.comp.emulators.kvm.devel/128427
    http://www.openwall.com/lists/oss-security/2014/10/23/7
    https://bugzilla.redhat.com/show_bug.cgi?id=1156615
    https://github.com/torvalds/linux/commit/a430c9166312e1aa3d80bce32374233bdbfeba32

    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