# CVE-2024-39549

## Summary

- **CVE ID:** CVE-2024-39549
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:U)
- **CWE:** CWE-401
- **Published:** Jul 11, 2024
- **Last Modified:** Mar 13, 2026

## Description

A Missing Release of Memory after Effective Lifetime vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute. This memory is not properly freed in all circumstances, leading to a Denial of Service (DoS).

Consumed memory can be freed by manually restarting Routing Protocol Daemon (rpd).

Memory utilization could be monitored by: 
user@host> show system memory or show system monitor memory status

This issue affects:

Junos OS:   *  All versions before 21.2R3-S8, 
  *  from 21.4 before 21.4R3-S8,

  *  from 22.2 before 22.2R3-S4, 
  *  from 22.3 before 22.3R3-S3, 
  *  from 22.4 before 22.4R3-S3,
  *  from 23.2 before 23.2R2-S1, 
  *  from 23.4 before 23.4R1-S2, 23.4R2.


Junos OS Evolved:
  *  All versions before 21.2R3-S8-EVO, 
  *  from 21.4 before 21.4R3-S8-EVO,
  *  from 22.2 before 22.2R3-S4-EVO, 
  *  from 22.3 before 22.3R3-S3-EVO, 
  *  from 22.4 before 22.4R3-S3-EVO,

  *  from 23.2 before 23.2R2-S1-EVO, 
  *  from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO.

## Affected Products

- Juniper Networks — Junos OS (0)
- Juniper Networks — Junos OS (21.4)
- Juniper Networks — Junos OS (22.2)
- Juniper Networks — Junos OS (22.3)
- Juniper Networks — Junos OS (22.4)
- Juniper Networks — Junos OS (23.2)
- Juniper Networks — Junos OS (23.4)
- Juniper Networks — Junos OS Evolved (0)
- Juniper Networks — Junos OS Evolved (21.4)
- Juniper Networks — Junos OS Evolved (22.2)
- Juniper Networks — Junos OS Evolved (22.3)
- Juniper Networks — Junos OS Evolved (22.4)
- Juniper Networks — Junos OS Evolved (23.2)
- Juniper Networks — Junos OS Evolved (23.4)

## References

- [CNA](https://supportportal.juniper.net/JSA83011)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.47%
- **EPSS Percentile:** 39.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._