CVE-2020-26139

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.

• CWE-287

• http://www.openwall.com/lists/oss-security/2021/05/11/12Mailing List, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdfPatch, Third Party Advisory
• https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.mdThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing List, Third Party Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWuThird Party Advisory
• https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63Third Party Advisory
• https://www.fragattacks.comThird Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/11/12Mailing List, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdfPatch, Third Party Advisory
• https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.mdThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing List, Third Party Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWuThird Party Advisory
• https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63Third Party Advisory
• https://www.fragattacks.comThird Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-019200.html
• https://cert-portal.siemens.com/productcert/html/ssa-913875.html

Published

May 11, 2021

Last Modified

Jun 17, 2026

Status

Modified

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