CVE-2024-39560

Adjacent kernel crash via persistent RSVP errors

Published Jul 10, 2024 · Updated Oct 1, 2024

Improper exception handling in Juniper Networks Junos OS and Junos OS Evolved allows adjacent attackers to crash the kernel through RSVP. The rpd routing daemon leaks kernel memory whenever a downstream RSVP neighbor maintains an uncorrected persistent error, eventually exhausting memory. Only systems configured with RSVP are exposed, and a logically adjacent unauthenticated neighbor can force a full kernel crash and service interruption.

CVSS severity7.1
High
EPSS probability0.25%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper exception handling in Juniper Networks Junos OS and Junos OS Evolved allows adjacent attackers to crash the kernel through RSVP. The rpd routing daemon leaks kernel memory whenever a downstream RSVP neighbor maintains an uncorrected persistent error, eventually exhausting memory. Only systems configured with RSVP are exposed, and a logically adjacent unauthenticated neighbor can force a full kernel crash and service interruption.

The record

CVE
CVE-2024-39560
Published
Jul 10, 2024
Updated
Oct 1, 2024
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-755, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <21.4R3-S5-EVO
  2. Affected versionversion=22.1-EVO <22.1R3-S5-EVO
  3. Affected versionversion=22.2-EVO <22.2R3-S3-EVO
  4. Affected versionversion=22.3-EVO <22.3R3-S2-EVO
  5. Affected versionversion=22.4-EVO <22.4R3-EVO
  6. Affected versionversion=23.2-EVO <23.2R2-EVO

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <21.4R3-S5-EVO; version=22.1-EVO <22.1R3-S5-EVO; version=22.2-EVO <22.2R3-S3-EVO; version=22.3-EVO <22.3R3-S2-EVO; version=22.4-EVO <22.4R3-EVO; version=23.2-EVO <23.2R2-EVO
Juniper Networks · Junos OSversion=0 <20.4R3-S9; version=21.2R1 <21.2*; version=21.4 <21.4R3-S5; version=22.1 <22.1R3-S5; version=22.2 <22.2R3-S3; version=22.3 <22.3R3-S2; version=22.4 <22.4R3; version=23.2 <23.2R2

Published CVSS scores

6.5Juniper NetworksCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1Juniper NetworksCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1499.004Endpoint Denial of Service: Application 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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