CVE-2022-22247Network attack vector

Unauthenticated kernel crash via crafted TCP segment

Published Oct 18, 2022 · Updated May 9, 2025

Improper input validation in Junos OS Evolved allows remote attackers to crash the kernel by sending a crafted TCP segment. The ingress TCP-segment processing path fails to reject the malformed segment before kernel handling, which triggers a panic. No authentication or user interaction is required; affected releases are 21.3 before 21.3R3-EVO, 21.4 before 21.4R2-EVO, and 22.1 before 22.1R2-EVO, and repeated delivery sustains the interruption.

CVSS severity7.5
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Junos OS Evolved allows remote attackers to crash the kernel by sending a crafted TCP segment. The ingress TCP-segment processing path fails to reject the malformed segment before kernel handling, which triggers a panic. No authentication or user interaction is required; affected releases are 21.3 before 21.3R3-EVO, 21.4 before 21.4R2-EVO, and 22.1 before 22.1R2-EVO, and repeated delivery sustains the interruption.

The record

CVE
CVE-2022-22247
Published
Oct 18, 2022
Updated
May 9, 2025
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-20, T1498
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 18, 2022CVE publishedPublication date reported by the CVE source.
  2. May 9, 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=21.3-EVO <21.3R3-EVO
  2. Affected versionversion=21.4-EVO <21.4R2-EVO
  3. Affected versionversion=22.1-EVO <22.1R2-EVO

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=21.3-EVO <21.3R3-EVO; version=21.4-EVO <21.4R2-EVO; version=22.1-EVO <22.1R2-EVO

Published CVSS scores

7.5Juniper NetworksCVSS:3.1/AV:N/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1498Network Denial of Service

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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