UBUNTU-CVE-2021-3520

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    UBUNTU-CVE-2021-3520

    Published: 30 Apr 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-3520

    Summary:

    Details: There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

    References: https://ubuntu.com/security/CVE-2021-3520, https://github.com/lz4/lz4/pull/972, https://ubuntu.com/security/notices/USN-4968-1, https://ubuntu.com/security/notices/USN-4968-2, https://www.cve.org/CVERecord?id=CVE-2021-3520

    Affected packages

    Package

    Name: lz4

    Purl: pkg:deb/ubuntu/[email protected]~r114-2ubuntu1+esm2?arch=source&distro=trusty/esm

    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
    UBUNTU-CVE-2021-3520 | CVE-DB