UBUNTU-CVE-2018-5391

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    UBUNTU-CVE-2018-5391

    Published: 14 Aug 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-5391
    Aliases:
    USN-3740-1
    USN-3740-2
    USN-3741-1

    Summary:

    Details: The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size.

    References: https://ubuntu.com/security/CVE-2018-5391, https://www.kb.cert.org/vuls/id/641765, https://ubuntu.com/security/notices/USN-3740-1, https://ubuntu.com/security/notices/USN-3740-2, https://ubuntu.com/security/notices/USN-3741-1, https://ubuntu.com/security/notices/USN-3741-2, https://ubuntu.com/security/notices/USN-3742-1, https://ubuntu.com/security/notices/USN-3742-2, https://www.cve.org/CVERecord?id=CVE-2018-5391

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-155.205

    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