UBUNTU-CVE-2020-21688

    Dashboard / Vulnerabilities / UBUNTU-CVE-2020-21688

    UBUNTU-CVE-2020-21688

    Published: 10 Aug 2021Last Modified: 29 May 2026
    Upstream:
    CVE-2020-21688

    Summary:

    Details: A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.

    References: https://ubuntu.com/security/CVE-2020-21688, https://trac.ffmpeg.org/ticket/8186, https://ubuntu.com/security/notices/USN-5472-1, https://ubuntu.com/security/notices/USN-5167-1, https://www.cve.org/CVERecord?id=CVE-2020-21688

    Affected packages

    Package

    Name: ffmpeg

    Purl: pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps%2Fxenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -7:2.8.17-0ubuntu0.1+esm2

    Affected versions

    7:2.7.2-1build1

    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-2020-21688 | CVE-DB