{"id":"CVE-2021-23270","details":"In Gargoyle OS 1.12.0, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set.","modified":"2026-07-09T00:06:14.390449Z","published":"2021-04-12T19:15:14.517Z","references":[{"type":"FIX","url":"https://github.com/ericpaulbishop/gargoyle/commit/24afe944a6ffff53d84a748384e276a4e95912ec"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ericpaulbishop/gargoyle","events":[{"introduced":"73ff591ced92f40b8c84f83883e872ec377cfa84"},{"last_affected":"73ff591ced92f40b8c84f83883e872ec377cfa84"},{"fixed":"24afe944a6ffff53d84a748384e276a4e95912ec"}],"database_specific":{"source":["CPE_STRING","REFERENCES"],"cpe":"cpe:2.3:a:gargoyle-router:gargoyle:1.12.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.12.0"},{"last_affected":"1.12.0"}]}}],"versions":["1.12.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23270.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}