USN-4968-2

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    USN-4968-2

    Published: 31 May 2021Last Modified: 29 Jun 2026

    Summary: lz4 vulnerability

    Details: USN-4968-1 fixed a vulnerability in LZ4. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Original advisory details: It was discovered that LZ4 incorrectly handled certain memory operations. If a user or automated system were tricked into uncompressing a specially- crafted LZ4 file, a remote attacker could use this issue to cause LZ4 to crash, resulting in a denial of service, or possibly execute arbitrary code.

    References: https://ubuntu.com/security/notices/USN-4968-2, https://ubuntu.com/security/CVE-2021-3520

    Affected packages

    Package

    Name: lz4

    Purl: pkg:deb/ubuntu/lz4?arch=source&distro=trusty%2Fesm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.0~r114-2ubuntu1+esm2

    Affected versions

    0.0~r94-2

    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-4968-2 | CVE-DB