CVE-2022-22180Network attack vector

Traffic interruption via IPv6 Packet DMA exhaustion

Published Jan 19, 2022 · Updated Sep 17, 2024

Denial of service in Juniper Networks Junos OS on affected EX switches allows remote attackers to interrupt traffic with specific IPv6 packets. The IPv6 packet path progressively consumes Packet DMA heap and does not handle its exhaustion before the device becomes unstable. No authentication is required; sustained exploitation stops forwarding or crashes the fxpc process.

CVSS severity7.5
High
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Juniper Networks Junos OS on affected EX switches allows remote attackers to interrupt traffic with specific IPv6 packets. The IPv6 packet path progressively consumes Packet DMA heap and does not handle its exhaustion before the device becomes unstable. No authentication is required; sustained exploitation stops forwarding or crashes the fxpc process.

The record

CVE
CVE-2022-22180
Published
Jan 19, 2022
Updated
Sep 17, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-754, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=18.4 <18.4R2-S10, 18.4R3-S10
  2. Affected versionversion=19.1 <19.1R3-S7
  3. Affected versionversion=19.2 <19.2R1-S8, 19.2R3-S4
  4. Affected versionversion=19.3 <19.3R3-S5
  5. Affected versionversion=19.4 <19.4R3-S7
  6. Affected versionversion=20.1 <20.1R3-S3
  7. Affected versionversion=20.2 <20.2R3-S3
  8. Affected versionversion=20.3 <20.3R3-S2
  9. Affected versionversion=20.4 <20.4R3-S1
  10. Affected versionversion=21.1 <21.1R2-S2, 21.1R3
  11. Affected versionversion=21.2 <21.2R1-S2, 21.2R2
  12. Affected versionversion=21.3 <21.3R1-S1, 21.3R2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=18.4 <18.4R2-S10, 18.4R3-S10; version=19.1 <19.1R3-S7; version=19.2 <19.2R1-S8, 19.2R3-S4; version=19.3 <19.3R3-S5; version=19.4 <19.4R3-S7; version=20.1 <20.1R3-S3; version=20.2 <20.2R3-S3; version=20.3 <20.3R3-S2; version=20.4 <20.4R3-S1; version=21.1 <21.1R2-S2, 21.1R3; version=21.2 <21.2R1-S2, 21.2R2; version=21.3 <21.3R1-S1, 21.3R2

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5Juniper Networks, Inc.CVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
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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