CVE-2024-21613

RPD restart via link-triggered patroot memory leak

Published Jan 12, 2024 · Updated Jun 17, 2025

Memory leakage in RPD in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers on an adjacent network to restart RPD. With OSPF or IS-IS traffic engineering enabled, a link flap causes RPD to retain patroot memory until exhaustion crashes the daemon. Exposure requires traffic engineering and the ability to induce adjacent link flaps; the resulting crash interrupts routing while RPD restarts.

CVSS severity6.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leakage in RPD in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers on an adjacent network to restart RPD. With OSPF or IS-IS traffic engineering enabled, a link flap causes RPD to retain patroot memory until exhaustion crashes the daemon. Exposure requires traffic engineering and the ability to induce adjacent link flaps; the resulting crash interrupts routing while RPD restarts.

The record

CVE
CVE-2024-21613
Published
Jan 12, 2024
Updated
Jun 17, 2025
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-401, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <21.3R3-S5-EVO
  2. Affected versionversion=21.4 <21.4R3-EVO
  3. Affected versionversion=22.1 <22.1R3-EVO
  4. Affected versionversion=22.2 <22.2R3-EVO

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <21.3R3-S5-EVO; version=21.4 <21.4R3-EVO; version=22.1 <22.1R3-EVO; version=22.2 <22.2R3-EVO
Juniper Networks · Junos OSversion=0 <21.2R3-S3; version=21.3 <21.3R3-S5; version=21.4 <21.4R3-S3; version=22.1 <22.1R3; version=22.2 <22.2R3

Published CVSS scores

6.5Juniper NetworksCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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