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High severity7.1NVD Advisory· Published Apr 22, 2021· Updated Jun 17, 2026

CVE-2021-0226

CVE-2021-0226

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.

Affected products

12
  • Juniper Networks/OS Evolved12 versions
    cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*+ 11 more
    • cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.1:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.2:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.2:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.2:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.3:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*
    • (no CPE)range: 19.4 prior to 19.4R2-S3-EVO, 20.1 prior to 20.1R2-S3-EVO, 20.2 prior to 20.2R2-S1-EVO, 20.3 prior to 20.3R2-EVO
    • (no CPE)range: 19.4-EVO

Patches

Vulnerability mechanics

References

1

News mentions

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