{"id":"CVE-2021-0226","state":"PUBLISHED","title":"Junos OS Evolved: The IPv6 BGP session will flap due to receipt of a specific IPv6 packet","description":"On Juniper Networks Junos OS Evolved devices, receipt of a specific IPv6 packet may cause an established IPv6 BGP session to terminate, creating a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue does not affect IPv4 BGP sessions. This issue affects IBGP or EBGP peer sessions with IPv6. This issue affects: Juniper Networks Junos OS Evolved: 19.4 versions prior to 19.4R2-S3-EVO; 20.1 versions prior to 20.1R2-S3-EVO; 20.2 versions prior to 20.2R2-S1-EVO; 20.3 versions prior to 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS releases.","publishedAt":"2021-04-22T19:36:56.622Z","updatedAt":"2024-09-17T00:11:39.685Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS Evolved"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS Evolved","versions":[{"version":"19.4-EVO","status":"affected","lessThan":"19.4R2-S3-EVO","versionType":"custom"},{"version":"20.1-EVO","status":"affected","lessThan":"20.1R2-S3-EVO","versionType":"custom"},{"version":"20.2-EVO","status":"affected","lessThan":"20.2R2-S1-EVO","versionType":"custom"},{"version":"20.3-EVO","status":"affected","lessThan":"20.3R2-EVO","versionType":"custom"}]}],"references":["https://kb.juniper.net/JSA11121"],"weaknesses":["CWE-665"],"ingestedAt":"2026-10-29T19:47:50.134Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/0xxx/CVE-2021-0226.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-0226","state":"PUBLISHED","datePublished":"2021-04-22T19:36:56.622Z","dateUpdated":"2024-09-17T00:11:39.685Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2020-10-27T00:00:00.000Z"},"containers":{"cna":{"title":"Junos OS Evolved: The IPv6 BGP session will flap due to receipt of a specific IPv6 packet","descriptions":[{"lang":"en","value":"On Juniper Networks Junos OS Evolved devices, receipt of a specific IPv6 packet may cause an established IPv6 BGP session to terminate, creating a Denial of Service (DoS) condition. 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