CVE-2021-4186

    Dashboard / Vulnerabilities / CVE-2021-4186

    CVE-2021-4186

    Published: 30 Dec 2021Last Modified: 8 Jul 2026

    Summary:

    Details: Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

    References: https://lists.debian.org/debian-lts-announce/2024/09/msg00049.html, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2EY2VFBU3YGGWI5BW4XKT3F37MYGEQUD/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q6XGBKWSQFCVYUN4ZK3O3NJIFP3OAFVT/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5AEK3XTOIOGCGUILUFISMGX54YJXWGJ/, https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.json, https://security.gentoo.org/glsa/202210-04, https://www.wireshark.org/security/wnpa-sec-2021-16.html, https://gitlab.com/wireshark/wireshark/-/issues/17737

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 9733f173ea5e6255e8da208ef183210aa264d948
    Fixed -None

    Affected versions

    wireshark-3.4.10
    wireshark-3.4.9
    wireshark-3.4.8
    wireshark-3.4.7
    wireshark-3.4.6
    wireshark-3.4.5
    wireshark-3.4.4
    wireshark-3.4.3
    wireshark-3.4.2
    wireshark-3.4.1
    wireshark-3.4.0

    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
    CVE-2021-4186 | CVE-DB