UBUNTU-CVE-2018-1093

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    UBUNTU-CVE-2018-1093

    Published: 1 Apr 2018Last Modified: 26 Aug 2026
    Upstream:
    CVE-2018-1093
    Aliases:
    USN-3676-1
    USN-3676-2
    USN-3752-1

    Summary:

    Details: The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.

    References: https://ubuntu.com/security/CVE-2018-1093, https://bugzilla.kernel.org/show_bug.cgi?id=199181, https://ubuntu.com/security/notices/USN-3676-1, https://ubuntu.com/security/notices/USN-3676-2, https://ubuntu.com/security/notices/USN-3752-1, https://ubuntu.com/security/notices/USN-3752-2, https://ubuntu.com/security/notices/USN-3754-1, https://ubuntu.com/security/notices/USN-3752-3, https://www.cve.org/CVERecord?id=CVE-2018-1093

    Affected packages

    Package

    Name: linux

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-157.207

    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