CVE-2020-26139

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    CVE-2020-26139

    Published: 11 May 2021Last Modified: 16 Apr 2026

    Summary:

    Details: An issue was discovered in the kernel in NetBSD 7.1. An Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. This might be abused in projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier to exploit other vulnerabilities in connected clients.

    References: http://www.openwall.com/lists/oss-security/2021/05/11/12, https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md, https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html, https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html, https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu, https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63, https://www.fragattacks.com, https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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-2020-26139 | CVE-DB