CVE-2022-22210

FPC reboot via crafted VxLAN packet

Published Jul 20, 2022 · Updated Sep 16, 2024

A NULL pointer dereference in Junos OS on QFX5000 and MX Series allows remote adjacent attackers to cause an FPC reboot via a VxLAN packet. The PFE's l2alm process mishandles a specific VxLAN packet and crashes, forcing the forwarding-card processor to reboot. Continued delivery sustains denial of service, and exploitation requires adjacent network access without authentication.

CVSS severity6.5
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL pointer dereference in Junos OS on QFX5000 and MX Series allows remote adjacent attackers to cause an FPC reboot via a VxLAN packet. The PFE's l2alm process mishandles a specific VxLAN packet and crashes, forcing the forwarding-card processor to reboot. Continued delivery sustains denial of service, and exploitation requires adjacent network access without authentication.

The record

CVE
CVE-2022-22210
Published
Jul 20, 2022
Updated
Sep 16, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-476, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=20.3 <20.3R3-S3
  2. Affected versionversion=20.4 <20.4R3-S2
  3. Affected versionversion=21.2 <21.2R2-S1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=20.3 <20.3R3-S3; version=20.4 <20.4R3-S2; version=21.2 <21.2R2-S1

Published CVSS scores

6.5NVDCVSS: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.

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

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-476NULL Pointer Dereference
T1499Endpoint 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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