USN-6168-2

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    USN-6168-2

    Published: 20 Jun 2023Last Modified: 29 Jun 2026

    Summary: libx11 vulnerability

    Details: USN-6168-1 fixed a vulnerability in libx11. This update provides the corresponding update for Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, and Ubuntu 18.04 ESM. Original advisory details: Gregory James Duck discovered that libx11 incorrectly handled certain Request, Event, or Error IDs. If a user were tricked into connecting to a malicious X Server, a remote attacker could possibly use this issue to cause libx11 to crash, resulting in a denial of service.

    References: https://ubuntu.com/security/notices/USN-6168-2, https://ubuntu.com/security/CVE-2023-3138

    Affected packages

    Package

    Name: libx11

    Purl: pkg:deb/ubuntu/libx11?arch=source&distro=trusty%2Fesm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:1.6.2-1ubuntu2.1+esm3

    Affected versions

    2:1.6.1-1ubuntu1
    2:1.6.1-1ubuntu2
    2:1.6.2-1ubuntu1
    2:1.6.2-1ubuntu2
    2:1.6.2-1ubuntu2.1
    2:1.6.2-1ubuntu2.1+esm1
    2:1.6.2-1ubuntu2.1+esm2

    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
    USN-6168-2 | CVE-DB