CVE-2024-21611

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A Missing Release of Memory after Effective Lifetime vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

In a Juniper Flow Monitoring (jflow) scenario route churn that causes BGP next hops to be updated will cause a slow memory leak and eventually a crash and restart of rpd.

Thread level memory utilization for the areas where the leak occurs can be checked using the below command:

user@host> show task memory detail | match so_in so_in6 28 32 344450 11022400 344760 11032320 so_in 8 16 1841629 29466064 1841734 29467744 This issue affects:

Junos OS

* 21.4 versions earlier than 21.4R3; * 22.1 versions earlier than 22.1R3; * 22.2 versions earlier than 22.2R3.

Junos OS Evolved

* 21.4-EVO versions earlier than 21.4R3-EVO; * 22.1-EVO versions earlier than 22.1R3-EVO; * 22.2-EVO versions earlier than 22.2R3-EVO.

This issue does not affect:

Juniper Networks Junos OS versions earlier than 21.4R1.

Juniper Networks Junos OS Evolved versions earlier than 21.4R1.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-401

Affected software

VendorProductVersions
Juniper NetworksJunos OS>= 21.4, < 21.4R3; >= 22.1, < 22.1R3; >= 22.2, < 22.2R3
Juniper NetworksJunos OS Evolved>= 21.4-EVO, < 21.4R3-EVO; >= 22.1-EVO, < 22.1R3-EVO; >= 22.2-EVO, < 22.2R3-EVO

References

Timeline

Published
Jan 12, 2024
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2024-21611: High severity, CVSS 7.5 | Vulnix