UBUNTU-CVE-2018-7755

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    UBUNTU-CVE-2018-7755

    Published: 8 Mar 2018Last Modified: 26 Aug 2026
    Upstream:
    CVE-2018-7755
    Aliases:
    USN-3695-1
    USN-3695-2
    USN-3696-1

    Summary:

    Details: An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

    References: https://ubuntu.com/security/CVE-2018-7755, https://lkml.org/lkml/2018/3/7/1116, https://ubuntu.com/security/notices/USN-3695-1, https://ubuntu.com/security/notices/USN-3695-2, https://ubuntu.com/security/notices/USN-3696-1, https://ubuntu.com/security/notices/USN-3696-2, https://ubuntu.com/security/notices/USN-3697-1, https://ubuntu.com/security/notices/USN-3697-2, https://ubuntu.com/security/notices/USN-3698-1, https://ubuntu.com/security/notices/USN-3698-2, https://www.cve.org/CVERecord?id=CVE-2018-7755

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/ubuntu/linux?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-153.203

    Affected versions

    3.11.0-12.19

    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